Patent Application
20220306886
The present invention relates to ophthalmic lenses, and more particularly to cosmetic contact lenses incorporating multiple effect layers to enhance the appearance of the eyes upon which the contact lenses are positioned and comprising designs to imply and demonstrate depth within a given pattern, to create variations within the iris region, to alter the color of the iris, to enlarge the iris, and to create negative space to allow the natural iris to contribute to the effect of the overall design. The overall design is a composite of varying degrees of overlapping translucent layers. The cosmetic contact lenses also comprising an annular shaped clear layer to encapsulate the multiple effect layers to provide safe, comfortable and high quality optical quality contact lenses. The cosmetic contact lenses also incorporate pearlescent pigments in one or more regions to create a shiny, radiant and iridescent appearance.
Contact lenses or contacts are simply lenses placed on the eye. Contact lenses are considered medical devices and may be worn to correct vision and/or for cosmetic or other therapeutic reasons. Contact lenses have been utilized commercially to improve vision since the 1950s. Early contact lenses made or fabricated from hard materials were relatively expensive and fragile. In addition, these early contact lenses were fabricated from materials that did not allow sufficient oxygen transmission through the contact lens to the conjunctiva and cornea which potentially could cause a number of adverseline clinical effects. Although these contact lenses are still utilized, they are not suitable for all patients due to their poor initial comfort. Later developments in the field gave rise to soft contact lenses, based upon hydrogels, which are extremely popular and widely utilized today. Silicone hydrogel contact lenses that are available today combine the benefit of silicone, which has extremely high oxygen permeability, with the proven comfort and clinical performance of hydrogels. Essentially, these silicone hydrogel-based contact lenses have higher oxygen permeability values and are generally more comfortable to wear than the contact lenses made of the earlier hard materials. Rigid gas permeable hard contact lenses, on the other hand, are made from siloxane-containing polymers but are more rigid than soft contact lenses and thus hold their shape and are more durable.
Currently available contact lenses remain a cost-effective means for vision correction. The thin plastic lenses fit over the cornea of the eye to correct vision defects, including myopia or nearsightedness, hyperopia or farsightedness, astigmatism, i.e., asphericity in the cornea, and presbyopia i.e. the loss of the ability of the crystalline lens to accommodate. Contact lenses are available in a variety of forms and are made of a variety of materials to provide different functionality. Daily wear soft contact lenses are typically made from soft polymer materials combined with water for oxygen permeability. Daily wear soft contact lenses may be daily disposable or extended wear disposable. Daily disposable contact lenses are usually worn for a single day and then thrown away, while extended wear disposable contact lenses are usually worn for a period of up to thirty days. Colored soft contact lenses use different materials to provide different functionality. For example, a visibility tint contact lens uses a light tint to aid the wearer in locating a dropped contact lens, enhancement tint contact lenses have a transparent or translucent tint that is meant to enhance one's natural eye color, the color tint contact lens comprises an opaque tint meant to change one's eye color, and the light filtering tint contact lens functions to enhance certain colors while muting others. Bifocal and multifocal contact lenses are designed specifically for patients with presbyopia and are available in both soft and rigid varieties. Toric contact lenses are designed specifically for patients with astigmatism and are also available in both soft and rigid varieties. Combination lenses combining different aspects of the above are also available, for example, hybrid contact lenses.
Cosmetic contact lenses may comprise patterns composed of one or more elements that completely, or more preferably, partially overlie the wearer's iris. These lenses may also comprise a limbal ring. A limbal ring is essentially an annular band of color that when the lens is on the eye and centered, partially or completely overlies the lens wearer's limbal region which is the junction of the sclera and the cornea. The inclusion of a limbal ring may make the iris appear larger, darker and/or more defined. The combination of the limbal ring and an iris pattern makes the appearance of the lens on eye more natural. In other words, an iris pattern allows the limbal ring to blend in naturally with the wearer's eyes and the combination of an iris pattern and a limbal ring creates blending, depth, contrast, and definition.
Other cosmetic contact lenses focus on the sclera rather than or in addition to the iris. For example, a contact lens may comprise a brightly colored peripheral portion, i.e. outside of the iris region, that may be opaque, semi-opaque and/or translucent. The bright portion may extend from the edge of the limbus to the edge of the contact lens creating the impression of a brighter or whiter sclera. These contact lenses may also include a limbal ring which as stated above, may make the iris appear larger, darker and/or more defined than it would otherwise.
While the above-described cosmetic contact lenses do enhance eye appearance, there exists a need in the cosmetic lens area for lenses comprising designs to imply and demonstrate depth within a given pattern, to create variations within the iris region, to alter the color of the iris, to enlarge the iris, and to create negative space to allow the natural iris to contribute to the effect of the overall design.
A clear coat is typically utilized to fully encapsulate the various designs/patterns; namely, the one or more effect layers within the contact lens. Currently, this clear coat covers the entire front curve surface of the contact lens. In order to maintain the precision optical surface and pathway, there exists a need in the cosmetic contact lens area for lenses with uncompromised optical quality while maintaining the functionality associated with full pigment encapsulation.
In addition, while the above-described cosmetic contact lenses do enhance eye appearance, there exists a need for lenses that also comprise effect pigments that may be incorporated into different regions of the lens to create a shiny, radiant and iridescent appearance.
The contact lens with improved, multiple and integrated effects of the present invention overcome the limitations associated with the prior art as briefly described above.
In accordance with a first aspect, the invention is directed to an eye enhancement contact lens comprising a curved polymeric lens having at least one printed layer of a pattern that visually changes the cosmetic appearance of the iris and limbus of an eye to an observer, wherein the pattern contains a special effect pigment in sufficient concentration to render the pattern less visible to an observer when positioned over the sclera, because of placement or normal lens movement on eye and iris size, than the same pattern that is free of special effect pigments, thereby providing a more natural appearance.
In accordance with a another aspect, the present invention is directed to an eye enhancement contact lens. The eye enhancement lens comprising a first region corresponding to the scleral region of an eye, a second region corresponding to the limbal region of an eye, a third region corresponding to an iris region of an eye, and mica based pearlescent pigments incorporated into the second region corresponding to the limbal region of an eye and configured to create a limbal region having a shiny, radiant and iridescent appearance.
In accordance with another aspect, the present invention is directed to an eye enhancement contact lens. The eye enhancement lens comprising a first region corresponding to the scleral region of an eye, a second region corresponding to the limbal region of an eye, a third region corresponding to an iris region of an eye, and mica based pearlescent pigments incorporated into the first, second and third and configured to create scleral, limbal and iris regions having a shiny, radiant and iridescent appearance.
In accordance with still another aspect, the present invention is directed to an eye enhancement contact lens. The eye enhancement lens comprising an effect design graphic corresponding to an iris region of an eye, the effect design graphic including mica based pearlescent pigments and configured to create an iris region having a shiny, radiant and iridescent appearance.
In accordance with still yet another aspect, the present invention is directed to an eye enhancement contact lens. The eye enhancement lens comprising a first region corresponding to the scleral region of an eye, a second region corresponding to the limbal region of an eye, a third region corresponding to an iris region of an eye, and mica based pearlescent pigments incorporated into at least one of the first, second and third regions, the mica based pearlescent pigments configured as an opacifier to create both an opaque, shiny, radiant and iridescent appearance.
Cosmetic contact lenses may be designed to alter the appearance of the eyes upon which they are worn in any number of ways, including the color of the entire eye and/or different regions of the eye. While not a requirement, cosmetic contact lenses may also be utilized to correct refractive error. Cosmetic contact lenses may also have a direct medical application. For example, cosmetic contact lenses may be utilized to restore the appearance of a damaged eye. Cosmetic contact lenses may include transparent, translucent, opaque-color enhancements or tints. Tints may include organic/inorganic pigments, dyes or special effect pigments. Printed regions on the contact lens may include the iris region (iris patterns), the limbal region (limbal rings), the scleral region (sclera brightening), or any combination thereof. In addition, patterns may be continuous, intermittent or any combination thereof.
The cosmetic contact lenses of the present invention utilize multiple effect layers to achieve a unique visual appearance. The multi-layer design may be utilized to enhance and/or highlight the appearance of the eyes upon which the contact lenses are positioned while maintaining a natural look. These exemplary designs each comprise three layers; namely, a unique limbal design graphic, a unique inner effect graphic and a unique outer effect graphic. The layers may be formed utilizing any number of design elements and design principles. For example, lines may be utilized to define shapes and create contours that imitate or mimic line structures, shapes and contours found in a natural iris. Color and hue values with varying levels of translucency and opacity may be utilized to create blending and contrast while varying color and hues may be utilized to imply depth by forming highlight and shadow. Space may be utilized to determine composition, for example, positive space may be utilized to define and imply effects while negative space may be utilized to allow the natural iris to contribute to the effect of the overall pattern. Perspective in overlapping layers may be utilized to imply and demonstrate depth within a given pattern. Texture may be utilized to create variation in the iris. As used in two-dimensional art, texture is created by the use of light and dark. Light and dark elements, as well as overlapping elements, may also be utilized to imply depth and form.
The cosmetic contact lenses of the present invention may comprise any of the above-described lenses with the incorporation of pearlescent pigments, including for example special effect pigments, to add a shiny, radiant and iridescent appearance to a wearer's eyes. The pigments may be added to any region of the lens, including the regions overlying the iris and/or the sclera. For example, if they are utilized in the region overlying the sclera, the combination or incorporation of pearlescent pigments will result in a brighter white sclera region that has a wet reflective appearance and which also looks natural. Additionally, the resulting lens are characterized by having (1) improved cosmesis and perceived customization to the eye and (2) better consumer satisfaction and performance by expanding the scope of perceived fitting for more eyes with different size irises and resulting operational efficiencies with a reduced need for discreet product SKUs since each product SKU can be applied across a broader range of iris sizes.
The incorporation of pearlescent pigments does not have any significant impact on the cosmetic contact lens manufacturing process; accordingly, a natural and shiny appearance may be achieved without significant changes.
The present invention may utilize an annular shaped clear base coat layer to completely encapsulate the enhancements and/or tints while providing an opening in the optical zone to provide high quality visual performance. The cosmetic contact lenses of the present invention provide a cost-effective means to enhance the visual appearance of a wearer's eyes while providing the optical quality and comfort of a non-cosmetic contact lens.
The foregoing and other features and advantages of the invention will be apparent from the following, more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings.
Contact lenses or contacts are simply lenses placed on the eye. Contact lenses are considered medical devices and may be worn to correct vision and/or for cosmetic or other therapeutic reasons. Contact lenses have been utilized commercially to improve vision since the 1950s. Early contact lenses made or fabricated from hard materials were relatively expensive and fragile. In addition, these early contact lenses were fabricated from materials that did not allow sufficient oxygen transmission through the contact lens to the conjunctiva and cornea which potentially could cause a number of adverse clinical effects. Although these contact lenses are still utilized, they are not suitable for all patients due to their poor initial comfort. Later developments in the field gave rise to soft contact lenses, based upon hydrogels, which are extremely popular and widely utilized today. Silicone hydrogel contact lenses that are available today combine the benefit of silicone, which has extremely high oxygen permeability, with the proven comfort and clinical performance of hydrogels. Essentially, these silicone hydrogel based contact lenses have higher oxygen permeabilities and are generally more comfortable to wear than the contact lenses made of the earlier hard materials. However, these new contact lenses are not totally without limitations.
Referring now to
The lens 100 illustrated in
A cosmetic contact lens is designed to enhance or alter the appearance of the eye upon which it is worn. While not a requirement, cosmetic contact lenses may also be utilized for the correction of refractive error. In addition, cosmetic contact lenses may also have direct medical application, for example, to restore the appearance of a damaged eye. Individuals who suffer from aniridia, the absence of an iris, dyscoria, damage of the iris, and/or arcus senilis or arcus senilus corneae, a disorder that lightens or discolors the limbus area, may utilize colored contact lenses that will give the appearance of a complete iris. Cosmetic contact lenses may include translucent/transparent color enhancement, tint, opaque color tint, artificial iris patterns, limbal rings, sclera brightening tints and/or any combination of the above.
More specifically, cosmetic contact lenses may be utilized to brighten the sclera and/or have a pattern that includes a limbal ring that serves to enhance the definition of the wearer's iris resulting in the iris appearing larger to viewers of the lens wearer. Additionally, cosmetic contact lenses may have additional pattern elements that completely or, preferably, partially overlie the wearer's iris. The cosmetic lenses may be utilized for enhancing a dark-eyed individual's iris, but also may be used to enhance the iris of a light-eyed lens wearer as well.
Referring to
The peripheral portion 206 is colored to enhance the appearance of the sclera. The coloring of the peripheral portion 206 may be opaque, translucent, or somewhere between the two, or semi-opaque. Exemplary embodiments enhance the appearance of the sclera by providing the sclera with a refreshed, natural appearance. Opaque as utilized herein shall be understood to mean a color that permits an average light transmittance in the 380 to 780 nm range of 0 to about 50 percent, and preferably 7 to about 50 percent. Translucent as utilized herein shall be understood to mean a color that permits an average light transmittance in the 380 to 780 nm range of about 50 to about 85 percent, and preferably from about 65 to about 85 percent.
Patterning comprising geometric shapes may be formed from regularly shaped structures as described above with respect to
In accordance with other exemplary embodiments, a cosmetic lens may comprise a limbal ring and a plurality of tapered spokes. As set forth above, a limbal ring is an annular band of color that, when the lens is on-eye and centered, partially or substantially completely overlies the lens wearer's limbal region, or the junction of the sclera with the cornea. Preferably, the limbal ring substantially completely overlies the limbal region. The innermost border or edge closest to the geometric center of the lens, of the limbal ring may form a circle having a diameter of about 8 mm to about 12 mm, preferably about 9 to about 11 mm, the circle being centered at the lens' geometric center. The ring may be of any suitable width and preferably is about 0.5 to about 2.5 mm in width, more preferably about 0.75 to about 1.25 mm in width.
Extending inwardly from the innermost border of the limbal ring toward the geometric center of the lens are substantially triangular-shaped structures that resemble spokes in a wheel. The tapered spokes may, but preferably do not, extend over the entire iris portion of the lens, meaning the portion of the lens that overlies the iris when the lens is on-eye and centered. Rather, preferably the spokes extend inwardly from the innermost edge of the limbal ring so that the innermost edge of the spoke pattern is located at about 6 mm or more, more preferably about 7 mm or more from the geometric center of the lens. The spokes may be of uniform or varying shapes and sizes and preferably are about 1 to about 2 mm in length.
In
In all of the patterns described with respect to
In addition to the spokes and limbal ring elements, the patterns may include any of a number of additional components. Such components may include geometric structures, such as dots and lines, or fanciful structures, including striae, feather-like shapes, and the like, and combinations thereof. In one exemplary embodiment, as illustrated in
As yet another alternative, in
In any of the patterns of the cosmetic contact lenses set forth herein, the center preferably is clear to ensure no impact on visual acuity. However, the center region may be an area of translucent/transparent or opaque color or any combination of opaque and translucent/transparent colors.
As used in a contact lens for either enhancing or altering the wearer's eye color, preferably the limbal ring element is a solid band of color that masks the color of the lens wearer's limbal region and more preferably, the masking color is an opaque color. Once again, limbal rings, sized appropriately, may be utilized to create a halo effect. The remaining elements, the spokes, dots and other pattern elements may be translucent or opaque depending on the desired cosmetic on-eye result. For purposes of the invention, by “translucent” is meant a color that permits an average light transmittance (% T) in the 380 to 780 nm range of about 60 to about 99%, preferably about 65 to about 85% T. By “opaque” is meant a color that permits an average light transmittance (% T) in the 380 to 780 nm range of 0 to about 55, preferably 7 to about 50% T.
The color selected for each of the limbal ring and iris pattern elements will be determined by the natural color of the lens wearer's iris and the enhancement or color change desired. Thus, elements may be any color, including any of a variety of hues and chromas of blue, green, gray, brown, black, yellow, red, or combinations thereof. Preferred colors for the limbal ring include any of the various hues and chromas of black, brown, gray, dark blue and dark green.
The color of the limbal ring, spokes and other pattern elements may also be substantially the same as, or complementary to, each other. For example, in
The brightly colored element comprising the peripheral portion may be pure white, near white, off white, light yellow, pale blue, light pink, light green, or any combination of the above. Preferably, it is matched so that it does not starkly contrast with the visible portion of the sclera that is not covered by the lens. These colors are preferably obtained by use of TiO2 with higher amounts yielding greater opacity and contrast. The addition of pigments includes iron oxide black, iron oxide brown, iron oxide yellow, iron oxide red, titanium dioxide, and the like, and combinations thereof, in small amounts to adjust the whiter colored element. In addition to these pigments, soluble and non-soluble dyes may be used, including dichlorotriazine and vinyl sulfone-based dyes. One exemplary embodiment being a colorant with 10 percent to 20 percent TiO2 and 80 percent to 90 percent clear binding polymer to provide appropriate translucency.
In general, the colored elements may be made from any organic or inorganic pigment suitable for use in contact lenses, or combinations of such pigments. The opacity may be controlled by varying the concentration of the pigment and titanium dioxide used, with higher amounts yielding greater opacity. Illustrative organic pigments include pthalocyanine blue, pthalocyanine green, carbazole violet, vat orange #1, and the like as well as combinations thereof. Examples of useful inorganic pigments include iron oxide black, iron oxide brown, iron oxide yellow, iron oxide red, titanium dioxide, and the like, as well as combinations thereof. In addition to these pigments, soluble and non-soluble dyes may be used, including dichlorotriazine and vinyl sulfone-based dyes. Useful dyes and pigments are commercially available.
In accordance with the present invention, a contact lens comprising a multi-layer design may be utilized to enhance the appearance of the eyes upon which the contact lenses are positioned while maintaining a natural look. The exemplary designs each comprise three layers; namely, a unique limbal design graphic, a unique inner effect graphic and a unique outer effect graphic. The order and color of printing the various layers has an impact on the final design as set forth in more detail below. In addition, each of the three layers may vary in color and design to create a unique appearance on eye.
The layers may be formed utilizing any number of design elements and design principles. For example, lines may be utilized to define shapes and create contours that imitate or mimic line structures, shapes and contours found in a natural iris. Color and hue values with varying levels of translucency and opacity may be utilized to create blending and contrast while varying color and hues may be utilized to imply depth by forming highlight and shadow. Space may be utilized to determine composition, for example, positive space may be utilized to define and imply effects while negative space may be utilized to allow the natural iris to contribute to the effect of the overall pattern. Perspective in overlapping layers may be utilized to imply and demonstrate depth within a given pattern. Texture created through contrasting colors and shapes may be utilized to create variation in the iris. As used in two-dimensional art, texture is created by the use of light and dark. Light and dark elements may also be utilized to imply depth and form.
As set forth above, the present invention utilizes three distinct layers to provide more depth and variation in the overall pattern. The limbal design graphic is the portion of the overall pattern that surrounds the outer diameter of the iris and is closest to the sclera and is meant to highlight, enhance and/or define the limbal region of the eye; however, it also comprises elements that extend into the iris. The inner effect graphic layer is the portion of the overall pattern that is meant to enhance the iris; however, it may comprise a portion that also contributes to highlighting, enhancing and/or defining the limbal region of the eye. The outer effect graphic layer is the portion of the overall pattern that is meant to enhance the iris; however, it may comprise a portion that also contributes to highlighting, enhancing and/or defining the limbal region of the eye. The multiple layer approach of the present invention may be utilized to create varying levels of transparency and/or opacity utilizing overlapping and non-overlapping translucent layers.
Various design elements, as explained above, may be utilized to achieve various effects. As with the limbal ring/tapered spoke patterns described above, the multi-layered design in accordance with the present invention may also use similar features. For example, spokes, fingers, hair-like structures, as well similar structures and/or dots may be utilized to blend a solid limbal band into the iris. In addition, various other geometric shapes, including those that are found in a natural iris may be incorporated into the various layers.
Referring to
In this exemplary embodiment, the entire limbal design graphic 1400 is a translucent medium brown formed from a composition comprising red iron oxide, titanium dioxide, trans-oxide yellow, yellow iron oxide, brown iron oxide, and black iron oxide pigments in proportions to create a color in the brown to black family. It is important to note that while the limbal design graphic 1400 is translucent in this exemplary embodiment, other designs may comprise opaque elements or a combination of opaque and translucent elements. This limbal design graphic 1400 is printed utilizing the techniques described in detail subsequently and it is printed first. In other words, it is the first graphic layer of the overall design that is to be incorporated into the lens. The order of printing affects the overall design as described in greater detail subsequently.
In this exemplary embodiment, the entire inner effect design graphic 1420 is a translucent orange formed from a composition comprising red iron oxide, trans-oxide yellow, brown iron oxide, and trans-oxide red pigments in proportions to create a color in the orange family. The orange family includes yellows and golds. These colors or colors in this family are meant to highlight the underlying natural iris color for individuals with eyes that are of a darker hue, for example, browns, dark browns, dark hazels and the like. Different colors would be utilized for individuals with eyes of a lighter hue, for example, blues, greens, light hazels, greys and the like. It is important to note that while the inner effect graphic 1420 comprises translucent elements, in other embodiments, it may comprise opaque elements and/or a combination of translucent and opaque elements. This inner effect graphic 1420 is printed utilizing the techniques described in detail subsequently and is printed second after the limbal graphic 1400. In other words, the inner effect graphic 1420 is printed after and on top of the limbal design graphic 1400. This printing order is from a manufacturing standpoint. From an observer's perspective, this layer, the inner effect design graphic 1420, would appear behind the graphic 1400. The outer diameter of the inner effect design graphic 1420 is less than the outer diameter of the limbal design graphic 1400 while the inner diameters are substantially equal.
In this exemplary embodiment, the entire outer effect design graphic 1440 is a translucent black formed from a composition comprising brown iron oxide and black iron oxide pigments. In this exemplary embodiment, where the outer effect design graphic 1440 and the limbal design graphic 1400 overlap, they create a darker, more defined/opaque area, while the portions of the designs that do not overlap leave a more translucent coloring providing translucent blending from opaque to clear. This technique allows for blending with the natural iris. The outer effect design graphic 1440 comprises a translucent design in this exemplary embodiment; however, in other embodiments, the design may comprise opaque elements and/or a combination of translucent and opaque elements. The outer effect graphic 1440 is printed utilizing the techniques described in detail subsequently and is printed third in order after and on top of the inner effect graphic layer 1420. This printing order is from the manufacturing standpoint. From an observer's perspective, this layer would appear behind the inner effect design graphic 1420. The outer diameter of the outer effect graphic 1440 is less than the outer diameter of the limbal design graphic 1400 while the inner diameters are substantially equal.
The overall design created by the three layers comprises an annular structure with an inner diameter of about 6.5 mm and an outer diameter in the range from about 12.675 mm to about 12.8 mm. The annular structure is similar to the iris structure of the eye by design. The open or negative space in the center of the lens corresponds to the pupillary region or optical zone of the eye and is preferably clear so as not to interfere with vision. However, as set forth above, this region may be tinted as well as any negative space.
Referring to
In this exemplary embodiment, the entire limbal design graphic 1500 is a translucent black formed from black iron oxide pigments. It is important to note that while the limbal design graphic 1500 is translucent in this exemplary embodiment, other designs may comprise opaque elements or a combination of opaque and translucent elements. The limbal design graphic 1500 is printed utilizing the techniques described in detail subsequently and it is printed first. In other words, it is the first graphic layer of the overall design that is to be incorporated into the lens. The order of printing affects the overall design as described in greater detail subsequently.
In this exemplary embodiment, the entire inner effect design graphic 1520 is a translucent medium brown formed from a composition comprising red iron oxide, titanium dioxide, trans-oxide yellow, yellow iron oxide, brown iron oxide and black iron oxide pigments in proportions to create a color in the gold to brown family. The colors utilized are meant to highlight or otherwise enhance the underlying natural iris color. Different colors are utilized for different color eyes. The inner effect design graphic 1520 may comprise opaque and/or a combination of opaque and translucent elements in alternate exemplary embodiments. The inner effect design graphic 1520 is printed utilizing the techniques described in detail subsequently and is printed second after the limbal graphic 1500. In other words, the inner effect graphic 1520 is printed after and on top of the limbal design graphic 1500. This printing order is from a manufacturing standpoint. From an observer's perspective, this graphic layer 1520 would appear behind the limbal design graphic 1500.The outer diameter of the inner effect design graphic 1520 is less than the outer diameter of the limbal design graphic 1500 while the inner diameters are substantially equal.
In this exemplary embodiment, the entire outer effect design graphic 1540 is a translucent gray formed from a composition comprising titanium dioxide and black iron oxide pigments. In this exemplary embodiment, where the outer effect design graphic 1540 and the limbal design graphic 1500 overlap, they create a darker, more defined/opaque area, while the portions of the designs that do not overlap leave a more translucent coloring providing translucent blending from opaque to clear. This technique allows for blending with the natural iris. The outer effect design graphic 1540 comprises a translucent design; however, other designs may incorporate opaque elements and/or a combination of opaque and translucent elements. The outer effect graphic 1540 is printed utilizing the techniques described in detail subsequently and is printed third in order after and on top of the inner effect graphic 1520. This printing order is from the manufacturing standpoint. From an observer's perspective, this layer would appear behind the inner effect design graphic 1520.The outer diameter of the outer effect graphic 1554 is less than the outer diameter of the limbal design graphic 1500 while the inner diameters are substantially equal.
The overall design created by the three layers comprises an annular structure with an inner diameter of about 6.0 mm and an outer diameter in the range from about 12.50 mm to about 12.775 mm. The annular structure is similar to the iris structure of the eye by design. The open or negative space in the center of the lens corresponds to the pupillary region or optical zone of the eye and is preferably clear so as not to interfere with vision. However, as set forth above, this region as well as any negative space may be tinted
Referring to
In this exemplary embodiment, the entire limbal design graphic 1600 is a translucent dark brown formed from a composition comprising brown iron oxide, and black iron oxide pigments in proportions to create a color in the brown to black family. The limbal design graphic 1600 comprises translucent elements; however, in other exemplary embodiments it may comprise opaque elements and/or a combination of opaque and translucent elements. The limbal design graphic 1600 is printed utilizing the techniques described in detail subsequently and it is printed first. In other words, it is the first graphic design of the overall design that is to be incorporated into the lens. The order of printing affects the overall design as described in greater detail subsequently.
In this exemplary embodiment, the entire outer effect design graphic 1620 is a translucent brown formed from a composition comprising red-iron oxide, titanium dioxide, trans-oxide yellow, phthalocyanine green, yellow iron oxide, brown iron oxide and black iron oxide pigments. In this exemplary embodiment, where the outer effect design graphic 1620 and the limbal design graphic 1600 overlap, they create a darker, more defined/opaque area, while portions of the designs that do not overlap leave a more translucent coloring providing translucent blending from opaque to clear. This technique allows for blending with the natural iris. The outer effect design graphic 1620 comprises a translucent design in this exemplary embodiment; however, in other exemplary embodiments, the design may comprise opaque elements and/or a combination of translucent and opaque elements. The outer effect design graphic 1620 is printed utilizing the techniques described in detail subsequently and is printed second after and on top of the limbal effect graphic layer 1600. This printing order is from the manufacturing standpoint. From an observer's perspective, this layer or graphic would appear behind the limbal design graphic 1600. The outer diameter of the outer effect graphic 1620 is less than the outer diameter of the limbal design graphic 1600 while the inner diameters are substantially equal.
In this exemplary embodiment, the entire inner effect design graphic 1640 is a translucent yellow formed from a composition comprising trans-oxide yellow, yellow iron oxide, brown iron oxide, and trans-oxide red pigments in proportions to create a color in the yellow family. As set forth above, yellow is part of the orange family which also includes golds. These colors are meant to highlight the underlying natural iris color for individuals with brown or dark eyes. Different colors would be utilized for lighter eye color. The inner effect design graphic 1640 is printed utilizing the techniques described in detail subsequently and is printed third in order after the outer effect graphic 1620. In other words, the inner effect graphic 1640 is printed after and on top of the outer design graphic 1620. This printing order is from the manufacturing standpoint. From an observer's perspective, this layer would appear behind the other layers. The inner effect design graphic 1640 comprises translucent elements but in alternative exemplary embodiments, it may comprise opaque elements and/or a combination of opaque and translucent elements. The outer diameter of the inner effect design graphic 1640 is less than the outer diameter of the limbal design graphic 1600 while the inner diameters are substantially equal.
The overall design created by the three layers comprises an annular structure with an inner diameter of about 6.7 mm and an outer diameter in the range from about 12.650 mm to about 12.725 mm. This annular structure is similar to the iris structure of the eye by design. The open or negative space in the center of the lens corresponds to the pupillary region or optical zone of the eye and is preferably clear so as not to interfere with vision. However, as set forth above, this region may be tinted as may be the negative space between elements.
Referring to
In this exemplary embodiment, the entire limbal design graphic 1700 is a translucent dark brown formed from a composition comprising brown iron oxide, and black iron oxide pigments in proportions to create a color in the brown to black family. Although the limbal design graphic is translucent, in other exemplary embodiments, it may comprise opaque elements and/or a combination of opaque and translucent elements. The limbal design graphic 1700 is printed utilizing the techniques described in detail subsequently and it is printed first. In other words, it is the first graphic design of the overall design that is to be incorporated into the lens. The order of printing affects the overall design as described in greater detail subsequently.
In this exemplary embodiment, the entire outer effect design graphic 1720 is a translucent brown formed from a composition comprising red-iron oxide, titanium dioxide, trans-oxide yellow, yellow iron oxide, brown iron oxide and black iron oxide pigments in proportion to create a color that is in the brown to black family. In this exemplary embodiment, where the outer effect design graphic 1720 and the limbal design graphic 1700 overlap, they create a darker, more defined/opaque area, while the portions of the designs that do not overlap have a more translucent coloring providing translucent blending from opaque to clear. This technique allows for blending with the natural iris. The outer effect design graphic 1720 comprises translucent elements, but may include opaque as well as a combination of translucent and opaque elements in other embodiments. This outer effect graphic 1720 is printed utilizing the techniques described in detail subsequently and is printed second in order after and on top of the limbal effect graphic layer 1700. This printing order is from the manufacturing standpoint. From an observer's perspective, this layer or graphic would be behind the limbal layer 1700. The outer diameter of the outer effect graphic 1720 is less than the outer diameter of the limbal design graphic 1700 while the inner diameters are substantially equal.
In this exemplary embodiment, the entire inner effect design graphic 1740 is a translucent brown formed from a composition comprising red iron oxide, phthalocyanine blue, titanium dioxide, trans-oxide yellow, yellow iron oxide, brown iron oxide, and black iron oxide pigments in proportions to create a color in the brown to black family. This inner effect design graphic 1740 is printed utilizing the utilizing the techniques described in detail subsequently and is printed third in order after the outer effect graphic 1720. In other words, the inner effect design graphic 1740 is printed after and on top of the outer design graphic 1720. The printing order is from the manufacturing standpoint. From an observer's perspective, this layer or graphic would appear behind the other layers or graphics. The inner effect design graphic 1740 comprises translucent elements, but may also comprise opaque elements and/or a combination of opaque and translucent elements. The outer diameter of the inner effect design graphic 1740 is less than the outer diameter of the limbal design graphic 1700 while the inner diameters are substantially equal.
The overall design created by the three layers comprises an annular structure with an inner diameter in the range from about 6.4 to about 6.6 mm and an outer diameter in the range from about 12.70 mm to about 12.775 mm. This annular structure is similar to the iris structure of the eye by design. The open or negative space in the center of the lens corresponds to the pupillary region or optical zone of the eye and is preferably clear so as not to interfere with vision. However, as set forth above, this region may be tinted as may be the negative space between the elements of the design.
Referring to
In this exemplary embodiment, the entire limbal design graphic 1800 is a transparent black formed from black iron oxide pigments. In other embodiments, the limbal design graphic may comprise opaque elements and/or a combination of opaque and translucent elements. The limbal design graphic 1800 is printed utilizing the techniques described in detail subsequently and it is printed first. In other words, it is the first graphic layer of the overall design that is to be incorporated into the lens. The order of printing affects the overall design as described in greater detail subsequently.
In this exemplary embodiment, the entire inner effect design graphic 1820 is a transparent orange formed from a composition comprising red iron oxide, trans-oxide yellow, yellow iron oxide, brown iron oxide, and trans-oxide red pigments in proportions to create a color in the orange family. The orange family includes yellows and golds. These colors or colors in this family are meant to highlight the underlying natural iris color for individuals with brown or dark eyes. Different colors would be utilized for individuals with light eyes. The inner effect graphic 1820 may comprise opaque elements and/or a combination of opaque and translucent elements in alternative embodiments. This inner effect graphic 1820 is printed utilizing the techniques described in detail subsequently and is printed second in order after the limbal graphic 1800. In other words, the inner effect graphic 1820 is printed after and on top of the limbal design graphic 1800. This printing order is from a manufacturing standpoint. From an observer's perspective, this layer would appear behind the graphic 1800. The outer diameter of the inner effect design graphic 1820 is less than the outer diameter of the limbal design graphic 1800 while the inner diameters are substantially equal.
In this exemplary embodiment, the entire outer effect design graphic 1840 is a translucent brown formed from a composition comprising red iron oxide, titanium-dioxide, trans-oxide yellow, yellow-iron oxide, brown iron oxide and black iron oxide pigments to create a family or colors ranging from brown to black. In this exemplary embodiment where the outer effect design graphic 1840 and the limbal design graphic 1800 overlap, they create a darker, more defined/opaque area, while the portions of the designs that do not overlap leave a more translucent coloring providing translucent blending from opaque to clear. This technique allows for blending with the natural iris. This outer effect graphic 1840 is printed utilizing the techniques described in detail subsequently and is printed third in order after and on top of the inner effect graphic layer 1820. This printing order is from the manufacturing standpoint. From an observer's perspective this layer would appear behind the inner design graphic 1820. The outer diameter of the outer effect graphic 1840 is less than the outer diameter of the limbal design graphic 1800 while the inner diameters are substantially equal.
The overall design created by the three layers comprises an annular structure with an inner diameter in the range from about 6.7 to about 7.1 mm and an outer diameter in the range from about 12.675 mm to about 12.750 mm. This annular design is similar to the iris structure of the eye by design. The open or negative space in the center of the lens corresponds to the pupillary region or optical zone of the eye and is preferably clear so as not to interfere with vision. However, tints may be utilized in this region as well as in the negative space between design elements.
The above-described exemplary embodiments relate to contact lenses that comprise a multi-layer design which may be utilized to enhance and/or highlight the appearance of the eyes upon which the contact lenses are positioned while maintaining a natural look. These exemplary designs each comprise three layers; namely, a unique limbal design graphic, a unique inner effect graphic and a unique outer effect graphic. The layers may be formed utilizing any number of design elements and design principles. For example, lines may be utilized to define shapes and create contours that imitate or mimic line structures, shapes and contours found in a natural iris. Color and hue values with varying levels of translucency and opacity may be utilized to create blending and contrast while varying color and hues may be utilized to imply depth by forming highlight and shadow. Space may be utilized to determine composition, for example, positive space may be utilized to define and imply effects while negative space may be utilized to allow the natural iris to contribute to the effect of the overall pattern. Perspective in overlapping layers may be utilized to imply and demonstrate depth within a given pattern. Texture may be utilized to create variation in the iris. As used in two-dimensional art, texture is created by the use of light and dark. Light and dark elements may also be utilized to imply depth and form.
As set forth above, the present invention utilizes three distinct layers to provide more depth and variation in the overall pattern. The limbal design graphic is the portion of the overall pattern that surrounds the outer diameter of the iris and is closest to the sclera and is meant to highlight, enhance and/or define the limbal region of the eye; however, it also comprises elements that extend into the iris. The inner effect graphic layer is the portion of the overall pattern that is meant to enhance the iris; however, it may comprise a portion that also contributes to highlighting, enhancing and/or defining the limbal region of the eye. The outer effect graphic layer is the portion of the overall pattern that is meant to enhance the iris; however, it may comprise a portion that also contributes to highlighting, enhancing and/or defining the limbal region of the eye. The multiple layer approach of the present invention may be utilized to create varying levels of transparency and/or opacity utilizing overlapping and non-overlapping translucent layers.
While the above-described exemplary embodiments illustrate the various design features that may be utilized in a cosmetic contact lens, it is important to note that various combinations and sub-combinations of the elements/features may be utilized to create new designs. A change in the order of print may impact the overall design. A change in any single color in at least one layer may impact the overall design. A change in the design in any single layer may impact the overall design and a change in any of the features of any design in any single layer may impact the overall design. A change in the size of any design and/or the degree of overlap between the layers may impact the overall design. A change in the amount of negative space/positive space in any single layer or in each of the layers may impact the overall design. A change in the translucency of any or all of the layers may impact the overall design. In addition, additional layers may also impact the overall design. The exemplary embodiments set forth above illustrate the different designs that may be achieved utilizing the various design elements described herein.
Although a number of terms are utilized throughout the specification, all designs described herein are meant to enhance the appearance of a wearers' eyes. Accordingly, as used herein the term enhance shall include accentuate, highlight, define, demark, improve, reinforce, amplify, magnify, intensify and/or any action which cosmetically alters the appearance of a wearers' eyes.
It is important to note that all of the color formulations set forth herein and related to the present invention are generally described with respect to the pigment content and are generally classified as a particular color. It is also important to note that any suitable colors may be utilized in implementing the present invention.
The designs/patterns/colors for the different regions of a cosmetic contact lens are developed based upon market research. These patterns are then etched into metal structures generally referred to as a cliché. More specifically, a metal plate, preferably made from steel and more preferably from stainless steel, is covered with a photo resist material that is capable of becoming water insoluble once cured. The patterns are selected or designed and then reduced to the desired size utilizing any of a number of suitable techniques such as photographic techniques, placed over the metal plate, and the photo resist material is cured. The metal plate or cliché is subsequently washed with an aqueous solution and the resulting image or pattern is etched into the metal plate to a suitable depth, for example, about twenty (20) microns. Once the clichés are fabricated, a multi-step process is utilized to manufacture the cosmetic contact lens as described below.
As set forth above, the lens forming material comprises etafilcon A. Etafilcon A is a well-known and patented material for manufacturing contact lenses. Etafilcon A is a copolymer of 2-hydroxyethal methacrylate and methacrylic acid cross-linked with 1, 1, 1-trimethyol propope trimethacrylate and ethylene glycol dimethacrylate. Etafilcon A is utilized in a number of contact lenses available from VISTAKON® a division of Johnson & Johnson Vision Care, Inc. It is important to note that while etafilcon A is utilized in the exemplary embodiments described herein, any suitable lens forming material may be utilized. For etafilcon A, the preferred binding polymers are a random block copolymer of HEMA, and MAA or a homopolymer of HEMA. The weight percentages, based on the total weight of the binding polymer, of each component in these embodiments is about 93 to about 100 weight percent HEMA and about 0 to about 2 weight percent MAA.
With the above-described process or similar process, the pigments are enclosed within the clear base and the bulk material forming the lens. In other words, all pigmented layers are enclosed within the lens material and never contact the eye.
It is important to note that any number of terms may be utilized to describe the pigmented region that is encapsulated as set forth in this invention. For example, the pigmented layers may be referred to as effect layers, print layers, design layers and pigmented print layers.
It is important to note that any suitable process or technique may be utilized to encapsulate a pigmented design as long as no base coat material is deposited in the central optic zone, but rather only lens monomer. In addition, it is important to note that the dimensions of the clear base coat material to be transferred from the cliché 2200 are based on factors such as pad geometry and hardness, and ultimately on lens swell and measurement techniques.
The exemplary transition section 2206 described above comprises both a pattern/matrix, illustrated in detail in the exploded view of
In an alternate exemplary embodiment wherein a cosmetic or non-cosmetic contact lens is coated, whether on the front surface, the back surface or both surfaces for other reasons than encapsulating pigments, for example, a lubricious coating for comfort, it may be desirable to utilize the annular structure with a transition section disclosed herein to better blend/integrate the materials while maintaining high optical quality. More specifically, if a contact lens were formed from a first material and then a second material was added on one or both of the surfaces to increase the lubriciousness of the lens, the blending of the two materials may induce stress as described above. The solution would once again be an annular coating/structure with a transition section as set forth above to reduce any potential induced stress.
In accordance with another exemplary embodiment, pearlescent pigments may be incorporated into one or more regions or portions of a cosmetic contact lens to add a shiny, radiant and iridescent appearance thereto. For example, these pearlescent pigments may be added to at least a portion of the lens corresponding to the wearer's sclera. A pearl luster and interference effect results from alternating layers of transparent materials with different refractive indices. Pearlescent pigments may be combined with other pearlescent pigments and/or in combination with different types of pigments, for example, iron oxides, phthalocyanimes and titanium dioxide, or dyes. Some of the resulting colors may be silver, gold and various shades of red, blue and green.
In general, the currently utilized preferred pigment for creating a brightly colored sclera region on a cosmetic contact lens is titanium dioxide. The cosmetic contact lenses in accordance with one exemplary embodiment of the present invention incorporate pearlescent pigments into regions corresponding to a wearer's sclera thereby creating a shiny, radiant and iridescent appearance. In other words, the combination or incorporation of pearlescent pigments, for example, mica based pearlescent pigments coated with titanium dioxide will result in a brighter white sclera region that has a wet reflective appearance and which also looks natural. The preferred pearlescent pigment is a silver type that is a mica based pigment coated with titanium dioxide. An exemplary mica based pigment is potassium aluminum silicate, which may be coated with titanium dioxide, TiO2, or iron oxide, Fe2O3. EMD Chemicals Inc. offers a food and drug approved natural silicate combined with titanium dioxide under the trademark Candurin®. It is important to note; however, that any pearlescent pigment may be combined with other pearlescent pigments and/or in combination with different types of pigments or dyes and utilized in the sclera region.
The cosmetic contact lenses of the present invention incorporating pearlescent pigments may include a limbal ring, a pattern that overlies the wearer's iris, a pattern that overlies the pupil region, a clear pupil region, a brightly colored sclera region, a brightly colored sclera region with a geometric pattern and/or any combination thereof. The limbal ring is preferably opaque or translucent. The iris area may be translucent, opaque or transparent. The pupil region is transparent or contains no pattern. Both pigments and dyes may be utilized to color the pattern elements of the limbal, iris and pupil regions of the contact lens. Any organic pigment, inorganic pigment, effect pigment, dye or any combination thereof may be utilized to color the elements of the patterns.
Referring now to
A binding polymer for the clear base ink was made using 96 g of 1-dodecanethiol (DODT), 56.54 g lauryl methacrylate (LMA), 7.40 g methacrylic acid (MAA), 1367 g of hydroxyethylmethacrylate (HEMA), 68.5 g glycerol, 378 g 1-ethoxy-2-propanol (EP), 1511 g isopropyl lactate (IPL) and 8.89 g 2,2′-azobis(2-methylbutyronitrile) (AMBN). First adding the DODT, monomers and solvents, except for about 50-100 cc of the IPL, were mixed in a five (5) liter blue cap bottle and stirred for ten (10) minutes. The mixture was then poured into a five (5) liter stainless steel reactor with stirrer and nitrogen. The mixture was stirred and heated for approximately twenty-five (25) minutes until the temperature was sixty-eight (68) degrees C. After the temperature was stabilized at sixty-eight (68) degrees C., the AMBN was dissolved in the remaining IPL and added while opening the nitrogen bleed. The polymerization was allowed to proceed for 16-24 hours after which the temperature was increased to eighty (80) degrees C. and the reaction was completed. The mixture was then allowed to equilibrate to room temperature. The viscosity of the mixture was adjusted as desired by mixing four (4) parts of IPL with one (1) part of EP.
As set forth above, the lens forming material comprises etafilcon A. Etafilcon A is a well-known and patented material for manufacturing contact lenses. Etafilcon A is a copolymer of 2-hydroxyethal methacrylate and methacrylic acid cross-linked with 1, 1, 1-trimethyol propope trimethacrylate and ethylene glycol dimethacrylate. Etafilcon A is utilized in a number of contact lenses available from VISTAKON® a division of Johnson & Johnson Vision Care, Inc. It is important to note that while etafilcon A is utilized in the exemplary embodiments described herein, any suitable lens forming material may be utilized.
In accordance with another exemplary embodiment, the present invention is directed to a cosmetic contact lens which comprises one or more effect layers, overlying one or more regions of the eye on which they are positioned, pearlescent pigments incorporated into portions of the contact lens overlying various regions of the eye, for example, the sclera as detailed above, the iris or both the sclera and iris, and a clear coat encapsulating the one or more effect layers and pearlescent pigments. Preferably, the clear coat has an annular shape as described above so that the central vision portion of the lens is of the highest optical quality. In accordance with another exemplary embodiment, pearlescent pigments may be incorporated in the section overlying the sclera, the iris and the limbal ring, in the sclera and the limbal ring, in the limbal ring and the iris, in the sclera alone, in the iris alone or in the limbal ring alone. In addition, there may be exemplary embodiments where the limbal ring has the following characteristics and may also comprise pearlescent pigments while in other exemplary embodiments no limbal ring may be utilized.
It is important to note that any of the sections of the contact lens may comprise ink compositions/dyes/pigments to create effect layers as described herein as well as coated mica based pearlescent pigments as described herein, alone or in combination with each other. For example, pigment formed effect layers may be combined with mica based pearlescent pigments, pigment plus mica based pearlescent pigment effect layers may be combined with mica based pearlescent pigments, pigment plus mica based pearlescent pigment effect layers may be combined with pigment plus mica based pearlescent pigment effect layers, and mica based pearlescent pigment based effect layers may be combined with mica based pearlescent pigment based effect layers and utilized in any of the sections comprising the contact lens. In addition, mica alone may be utilized to form an effect layer, mica may be utilized as an opacifier or as a primary additive in forming a color composition, for example, mica may be utilized to make a more vibrant yellow.
More specifically, mica based pearlescent pigments may be utilized as an opacifier in forming the limbal ring or it may be utilized as the primary element in forming the limbal ring itself. In one exemplary embodiment as illustrated in
Mica based pearlescent pigments may be utilized in forming the sections overlying the iris region. For example, mica based pearlescent pigments may be utilized to create an effect layer. Different coatings on the mica may be utilized. Mica based pearlescent pigments may be added to the existing effect layers. Mica based pearlescent pigments may be added as an opacifier in the existing effect layers. In addition, mica based pigments may be utilized to develop new colors.
Referring now to
Mica based pearlescent pigments may be utilized in forming the sections overlying the sclera region. For example, mica based pearlescent pigments may be utilized to create an effect layer in the sclera. Different coatings on the mica may be utilized. Mica based pearlescent pigments may be added to the existing effect layers in the scleral region, for example, brightening colors. Mica based pearlescent pigments may be added as an opacifier in the scleral region. In addition, mica based pigments may be utilized to develop new colors for use in the sclera regions. The extent and quantity of the mica based pearlescent pigments to be added to the one or more sections or regions of the contact lens may be adjusted depending on the impact desired ranging from subtle to noticeable.
Although shown and described in what is believed to be the most practical and preferred embodiments, it is apparent that departures from specific designs and methods described and shown will suggest themselves to those skilled in the art and may be used without departing from the spirit and scope of the invention. The present invention is not restricted to the particular constructions described and illustrated but should be constructed to cohere with all modifications that may fall within the scope of the appended claims.
For eye enhancement contact lenses with improved cosmesis that are either round in shape or non-round in shape, the following definitions apply.
Special effect pigments comprise muscovite mica, synthetic fluorphlogopite, synthetic aluminum oxides, borosilicates, calcium aluminum borosilicates, silicon dioxide platelets, metal oxide coated muscovite mica, metal oxide coated synthetic fluorphologopite, metal oxide coated synthetic aluminum oxides, metal oxide coated borosilicates, metal coated calcium aluminum borosilicates, metal oxide coated silicon dioxide platelets and combinations thereof. Other commonly known interference pigments can be used as special effect pigments as well.
Colorants comprise metal oxide pigments, organic dyes, cholesteric liquid crystals, and combinations thereof.
Metal oxide pigments comprise iron oxide, chromium oxide, titanium dioxide, and combinations thereof. Other metal oxides can be used.
Organic dyes comprise phthalocyanine blue, phthalocyanine green, carbazole violet, vat orange 1, and combinations thereof. Other organic dyes can be used.
The weight ratio of colorant to special effect pigment in the pattern can vary from zero to about 99; from zero to 10; from zero to 1 for brown eyes; from zero to 0.5 for green eyes; and from zero to 0.3 for blue eyes.
Special effect pigment inks comprise at least one special effect pigment and at least one solvent, optionally further comprising a colorant, a binding polymer or copolymer. The binding polymer or copolymer can be any polymer which enhances the performance of the ink. In some cases, the binding polymer or copolymer is made from a subset of the monomers used to make the hydrogel or silicone hydrogel contact lens. In some cases, the binding polymer or copolymer is identical to one used in the clear base ink formulation.
The concentration of specific effect pigment in the ink formulation can individually vary from about 0.01 to about 50 weight percent; from about 0.01 to about 30 weight percent; from about 0.5 to about 40 weight percent; from about 0.5 to about 25 weight percent; from about 5 to about 30 weight percent; and from about 5 to about 20 weight percent. The concentration of colorant in the ink formulation can individually vary from about 0.01 to about 27 weight percent; from about 0.1 to about 10 weight percent; and from about 0.1 to about 5 weight percent. Suitable solvents include, but are not limited to, ethanol, 1-propanol, 2-propanol, 1-ethoxy-2-propanol (1E2P), t-butyl alcohol, t-amyl alcohol, and 3,7-dimethyl-1,7-octanediol (D30), tripropylene glycol methyl ether (TPME), isopropyl lactate (IPL), 1-(2-hydroxy ethyl)-2-pyrrolidone (HEP), glycerol, or mixtures of two or more thereof. Preferred solvents are 1E2P, IPL, D30, HEP, 1-propanol, or mixtures thereof.
For reasons of completeness, various aspects of the disclosure are set forth in the following numbered clauses.
The following abbreviations will be used throughout the Examples and have the following meanings:
The eye enhancement contact lenses of the present invention are deemed to exhibit improved cosmesis when the cosmetic patterns are barely visible or not discernable to a third-party observer when positioned over the sclera by placement or normal movement on the eye. A graphical method for determining whether or not improved cosmesis is operable for a given cosmetic pattern is shown in
A binding copolymer was made by free radical polymerization methods from HEMA and MAA using AIBN as the initiator and DODT as the chain transfer agent, having about 1.4 weight percent MAA repeating units. The copolymerization conditions can be varied to control the composition, molecular weight and molecular weight distribution of the binding copolymer. The composition was about 1.4 weight percent MAA repeating units, about 96.6 weight percent HEMA repeating units, about 2 weight percent DODT. The binding copolymer interacts and stabilizes the pigment/dye dispersion. The binding copolymer was dissolved in a solution of 4:1 (w/w) solution of IPL:1E2P in the concentration range from about 20 weight percent to about 40 weight percent. A typical binding copolymer concentration is 30 weight percent. The solution viscosity can be adjusted as desired by dilution with 4:1 (w/w) solution of IPL:1E2P or with 1-propanol. 1-Propanol is preferred.
Colored inks were prepared by mixing pigments and/or dyes into the clear base ink at certain concentrations to impart the desired colors, patterns, and/or effects in a cosmetic contact lens. The concentration of pigments and dyes can vary from about 1 weight percent to about 25 weight percent, depending on the opacity, translucency, or transparency of the printed layer. 1-Propanol can be added after the pigments and dyes have been added to adjust viscosity or modify evaporation rates. In Table A, six special effect ink compositions are listed. The concentration of the specific pigment or dye is listed in weight percentages. The clear base ink contained about 30 weight percent of a binding copolymer composed of about 1.4 weight percent MAA repeating units, about 96.6 weight percent HEMA repeating units, about 2 weight percent DODT in a 4:1 (w/w) solution of IPL:1E2P. The Brookfield viscosities of these colored inks were reduced by adding 1-propanol to the initial pigment/dye dispersions so that the Brookfield viscosity was between about 5000 centipoise and about 8000 centipoise, preferably between about 5500 centipoise and 6500 centipoise.
Colored inks were prepared by mixing pigments and/or dyes into the clear base ink at certain concentrations to impart the desired colors, patterns, and/or effects in a cosmetic contact lens. 1-Propanol can be added after the pigments and dyes have been added to adjacent viscosity or modify evaporation rates. In Tables B and C, eleven special effect ink compositions are listed. The concentration of the specific pigment or dye is listed in weight percentages. The relative amounts of Flamenco Sparkle Gold, Iron Oxide Black, and Iron Oxide Yellow pigments were varied. The total pigment concentration varied from about 5.01 weight percent to about 40 weight percent, depending on the opacity, translucency, or transparency of the printed layer. The clear base ink contains about 30 weight percent of a binding copolymer composed of about 1.4 weight percent MAA repeating units, about 96.6 weight percent HEMA repeating units, about 2 weight percent DODT in a 4:1 (w/w) solution of IPL:1E2P. The Brookfield viscosities of these colored inks are reduced by adding 1-propanol to the initial pigment dispersions so that the Brookfield viscosity is between about 5000 centipoise and about 8000 centipoise, preferably between about 5500 centipoise and 6500 centipoise.
Printed contact lenses were fabricated on an automated pilot manufacturing line capable of pad printing and contact lens fabrication wherein the oxygen gas level was maintained between 0.5 and 5%. The front and base curve molds can be manufactured from any polymer; however, homopolymers, copolymers, and blends of PS, PP, TT, and Z are preferred. For example, the front curve mold was made from polystyrene, and the base curve mold from Zeonor. The front and base curve molds were degassed for about twelve hours prior to use. After the clear coat was printed and sufficiently dry (dry enough to deposit the next layer without lifting or changing the clear coat), an effect layer cliché having the pattern shown in
Once print layers have dried, about 100 microliters of RMM listed in Table D were dosed into the printed front curve mold at ambient temperature. The RMM was prepared by dissolving the reactive components in the relative amounts listed in Table D in BAGE to make a 52:48 (w/w) solution of reactive components to diluent. The base curve mold was then placed on top of the front curve mold. The pallets containing the mold assemblies were then moved into the curing tunnel at 60-70° C. The time between dosing the RMM and entering the curing chamber was controlled to allow the RMM to diffuse into the printed layers without smearing. The RMM was photopolymerized around the printed layers using 420 nanometer LEDs which were positioned above the pallets to achieve an intensity of about 5 mW/cm2 for about 4 minutes.
The printed lenses were partially de-molded with most lenses adhering to the FC and released from the BC and hydrated by submerging the lenses into DIW containing about 800 ppm Tween 80 at 70° C. for about one hour followed by equilibration in packing solution at 70° C. for another hour. A person of ordinary skill recognizes that the exact lens release process can be varied depending on the lens formulation and mold materials. The purpose of the lens release process is to release all lenses without defects and transition from diluent swollen networks to the packing solution swollen hydrogels. The lenses were transferred into foil heat sealed blister packages and subsequently sterilized by autoclaving at 124° C. for about 18 minutes. When a lens was placed on an artificial eye having a brown iris, the pixie effect was observed by moving the pattern over the white sclera of the artificial eye. The pattern appears to blend into the sclera.
Printed contact lenses were fabricated on an automated pilot manufacturing line capable of pad printing and contact lens fabrication wherein the oxygen gas level was maintained between 0.5 and 5%. The front and base curve molds can be manufactured from any polymer; however, homopolymers, copolymers, and blends of PS, PP, TT, and Z are preferred. For example, the front curve mold was made from polystryene, and the base curve mold from Zeonor. The front and base curve molds were degassed for about twelve hours prior to use. After the clear coat was printed and sufficiently dry (dry enough to deposit the next layer without lifting or changing the clear coat), an effect layer cliché having the pattern shown in
Once print layers have dried, about 100 microliters of RMM listed in Table D were dosed into the printed front curve mold at ambient temperature. The RMM was prepared by dissolving the reactive components in the relative amounts listed in Table D in BAGE to make a 52:48 (w/w) solution of reactive components to diluent. The base curve mold was then placed on top of the front curve mold. The pallets containing the mold assemblies were then moved into the curing tunnel at 60-70° C. The time between dosing the RMM and entering the curing chamber was controlled to allow the RMM to diffuse into the printed layers without smearing. The RMM was photopolymerized around the printed layers using 420 nanometer LEDs which were positioned above the pallets to achieve an intensity of about 5 mW/cm2 for about 4 minutes.
The printed lenses were partially de-molded with most lenses adhering to the FC and released from the BC and hydrated by submerging the lenses into DIW containing about 800 ppm Tween 80 at 70° C. for about one hour followed by equilibration in packing solution at 70° C. for another hour. A person of ordinary skill recognizes that the exact lens release process can be varied depending on the lens formulation and mold materials. The purpose of the lens release process is to release all lenses without defects and transition from diluent swollen networks to the packing solution swollen hydrogels. The lenses were transferred into foil heat sealed blister packages and subsequently sterilized by autoclaving at 124° C. for about 18 minutes. When a lens was placed on an artificial eye having a brown iris, the pixie effect was observed by moving the pattern over the white sclera of the artificial eye. The pattern appears to blend into the sclera.
Printed contact lenses were fabricated on an automated pilot manufacturing line capable of pad printing and contact lens fabrication wherein the oxygen gas level was maintained between 0.5 and 5%. The front and base curve molds can be manufactured from any polymer; however, homopolymers, copolymers, and blends of PS, PP, TT, and Z are preferred. For example, the front curve mold was made from polystryene, and the base curve mold from Zeonor. The front and base curve molds were degassed for about twelve hours prior to use. After the clear coat was printed and sufficiently dry (dry enough to deposit the next layer without lifting or changing the clear coat), an effect layer cliché having the pattern shown in
Once print layers have dried, about 100 microliters of RMM listed in Table D were dosed into the printed front curve mold at ambient temperature. The RMM was prepared by dissolving the reactive components in the relative amounts listed in Table D in BAGE to make a 52:48 (w/w) solution of reactive components to diluent. The base curve mold was then placed on top of the front curve mold. The pallets containing the mold assemblies were then moved into the curing tunnel at 60-70° C. The time between dosing the RMM and entering the curing chamber was controlled to allow the RMM to diffuse into the printed layers without smearing. The RMM was photopolymerized around the printed layers using 420 nanometer LEDs which were positioned above the pallets to achieve an intensity of about 5 mW/cm2 for about 4 minutes.
The printed lenses were partially de-molded with most lenses adhering to the FC and released from the BC and hydrated by submerging the lenses into DIW containing about 800 ppm Tween 80 at 70° C. for about one hour followed by equilibration in packing solution at 70° C. for another hour. A person of ordinary skill recognizes that the exact lens release process can be varied depending on the lens formulation and mold materials. The purpose of the lens release process is to release all lenses without defects and transition from diluent swollen networks to the packing solution swollen hydrogels. The lenses were transferred into foil heat sealed blister packages and subsequently sterilized by autoclaving at 124° C. for about 18 minutes. When a lens was placed on an artificial eye having a brown iris, the pixie effect was observed by moving the pattern over the white sclera of the artificial eye. The pattern appears to blend into the sclera.
Printed contact lenses were fabricated on an automated pilot manufacturing line capable of pad printing and contact lens fabrication wherein the oxygen gas level was maintained between 0.5 and 5%. The front and base curve molds can be manufactured from any polymer; however, homopolymers, copolymers, and blends of PS, PP, TT, and Z are preferred. For example, the front curve mold was made from polystryene, and the base curve mold from Zeonor. The front and base curve molds were degassed for about twelve hours prior to use. After the clear coat was printed and sufficiently dry (dry enough to deposit the next layer without lifting or changing the clear coat), an effect layer cliché having the pattern shown in
Once print layers have dried, about 100 microliters of RMM listed in Table D were dosed into the printed front curve mold at ambient temperature. The RMM was prepared by dissolving the reactive components in the relative amounts listed in Table D in BAGE to make a 52:48 (w/w) solution of reactive components to diluent. The base curve mold was then placed on top of the front curve mold. The pallets containing the mold assemblies were then moved into the curing tunnel at 60-70° C. The time between dosing the RMM and entering the curing chamber was controlled to allow the RMM to diffuse into the printed layers without smearing. The RMM was photopolymerized around the printed layers using 420 nanometer LEDs which were positioned above the pallets to achieve an intensity of about 5 mW/cm2 for about 4 minutes.
The printed lenses were partially de-molded with most lenses adhering to the FC and released from the BC and hydrated by submerging the lenses into DIW containing about 800 ppm Tween 80 at 70° C. for about one hour followed by equilibration in packing solution at 70° C. for another hour. A person of ordinary skill recognizes that the exact lens release process can be varied depending on the lens formulation and mold materials. The purpose of the lens release process is to release all lenses without defects and transition from diluent swollen networks to the packing solution swollen hydrogels. The lenses were transferred into foil heat sealed blister packages and subsequently sterilized by autoclaving at 124° C. for about 18 minutes. When a lens was placed on an artificial eye having a brown iris, the pixie effect was observed by moving the pattern over the white sclera of the artificial eye. The pattern appears to blend into the sclera.
Examples 5-15
Printed contact lenses are fabricated in a glove box wherein the oxygen gas level was maintained between 0.5 and 5%. An annular clear coat is printed onto the front curve mold using a laboratory scale pad printer. The front and base curve molds can be manufactured from any polymer; however, homopolymers, copolymers, and blends of PS, PP, TT, and Z are preferred. The front and base curve molds are typically degassed for about twelve hours prior to use. After the clear coat has dried, an effect layer cliché having the pattern shown in
Once print layers have dried, about 100 microliters of RMM listed in Table D were dosed into the printed front curve mold at ambient temperature. The RMM was prepared by dissolving the reactive components in the relative amounts listed in Table D in BAGE to make a 52:48 (w/w) solution of reactive components to diluent. The base curve mold was then placed on top of the front curve mold. The pallets containing the mold assemblies were then moved into the curing tunnel at 60-70° C. The time between dosing the RMM and entering the curing chamber was controlled to allow the RMM to diffuse into the printed layers without smearing. The RMM was photopolymerized around the printed layers using 420 nanometer LEDs which were positioned above the pallets to achieve an intensity of about 5 mW/cm2 for about 4 minutes.
The printed lenses were partially de-molded with most lenses adhering to the FC and released from the BC and hydrated by submerging the lenses into DIW containing about 800 ppm Tween 80 at 70° C. for about one hour followed by equilibration in packing solution at 70° C. for another hour. A person of ordinary skill recognizes that the exact lens release process can be varied depending on the lens formulation and mold materials. The purpose of the lens release process is to release all lenses without defects and transition from diluent swollen networks to the packing solution swollen hydrogels. The lenses are transferred into vials and subsequently sterilized by autoclaving at 122° C. for 30 minutes.
Example 5 was repeated except that ink#7 was replaced by ink#8 through ink#17. Tables B and C also list the inks used in each example.
In examples 13-15, in which the inks comprised only mica pigments between twenty and forty weight percent, when the inventive lens was placed on an artificial eye having a brown iris, the pixie effect was observed by moving the pattern over the white sclera of the artificial eye. The pattern appears to blend into the sclera. The pattern of example 13 made using a 40-weight percent Flamenco Sparkle Gold Mica ink was slightly visible even though the pixie effect was still substantially operable. Similarly, the patterns of examples 9 and 10, in which the inks comprised 0.5 weight percent iron oxide black in addition to the mica pigment, were also slightly visible even though the pixie effect was still substantially operable. In all other examples 7-8and 11-12, when the inventive lenses were placed on artificial eyes having brown irises, the pixie effect was observed by moving the pattern over the white sclera of the artificial eyes. The pattern appears to blend into sclera.
This application claims priority to U.S. Provisional Patent Application Ser. No. 63/167,340, filed Mar. 29, 2021, which is incorporated herein by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 63167340 | Mar 2021 | US |
