The present application is based on, and claims priority from, Taiwan application number 109212846 filed Sep. 29, 2020, the disclosure of which is hereby incorporated by reference herein in its entirety.
The present disclosure relates to the field of corneal shaping technology. Specifically, the present invention relates to a suction pump orthokeratology lens that shapes the cornea through suction pump technology.
Orthokeratology (OK) is a technique that gradually changes the shape of the cornea by systematically wearing a rigid orthokeratology lens to temporarily improve or remove the refractive error.
In general, the special design of the orthokeratology lens can gently change the shape of the corneal surface in a gradual manner, turning it into a spherical curve, to effectively reduce myopia and corneal astigmatism. The patient can retain clear vision after correction, but the cornea will return to its original shape if not worn for a long time.
Therefore, conventional technology requires the constant replacement of hard contact lenses during the correction period. That is, the conventional orthokeratology lens must be worn for a long time to achieve the effect of correcting vision.
As mentioned previously, shaping the cornea effectively and shortening the time for shaping the cornea has become an urgent issue in this technical field that needs to be improved.
To solve the lack of orthokeratology mentioned before, one of the purposes in the present invention is to effectively shape the cornea and shorten the time of corneal shaping, thereby achieving the goal of significant vision correction.
In order to achieve the above purpose, the present invention provides a suction pump orthokeratology lens, comprising an outer surface and an inner surface; wherein the inner surface comprising a stable curve positioned on the outer periphery of the inner surface with an asymmetrical shape; a base curve positioned at the center-periphery of the inner surface, and the base curve generates a pressing force to the eyes of a user; and a reverse curve positioned between the base curve and the stable curve of the inner surface with a symmetrical or asymmetrical shape, and a suction pumping room is formed between the base curve, the reverse curve, and the eye.
In particular, when the base curve generates the pressing force to the eye, the cornea in the suction pumping room will deform in the direction of the reverse curve and the base curve's position according to the base curve's shape.
Since the stable curve is an asymmetric shape and matched with the asymmetric shape of the cornea, it can generate a tiny suction force, so that although the orthokeratology lens would contact the cornea, it could still slide on the eye without injuring the cornea.
In particular, the stable curve has at least one contact point, and the contact point is in contact with the cornea so that a gap is formed between the stable curve and the eye to generate a tiny suction force, which wouldn't affect the stability of the lens on the eye. It can also help the suction pump orthokeratology lens slidably worn on the eyes.
In particular, the left and right or up and down shapes of the reverse curve are symmetrical or asymmetrical with each other.
For easier to understanding the above disclosure and other objects, features, advantages, and embodiments of the present invention, the description of the drawings is as follows:
According to the common operating method, the various features and elements in the figure are not drawn to actual scale. The drawing method aims to present the specific features and elements related to the present invention in the best way. In addition, the same or similar element symbols are used to indicate similar elements and components in different drawings.
The descriptions presented in embodiments of the specification are only technical philosophy and characteristics of the present application that can be understood and practiced by a person skilled in the art; the embodiments which should not be taken as examples to limit claims, thereinafter may be modified or changed by the person based on the disclosed embodiments in the present disclosure without departing from the spirit of claims.
The following is a further description of this creation in conjunction with the diagrams:
The base curve 30 is positioned at the center-periphery of the inner surface 20. When the user wears the orthokeratology lens 100, the base curve 30 will generate a pressing force to the eye and deform the eye which is on the relative position of the base curve.
The reverse curve 40 is positioned between the base curve 30 and the stable curve 50 of the inner surface 20 with a symmetrical or asymmetrical shape, and a suction pumping room SR is formed between the base curve 30, the reverse curve 40, and the eye 60. When the eye 60 deformed under the pressing force, the cornea 61 in the suction pumping room SR will deform in the direction of the position of the base curve 30 and reverse curve 40. And the deformation of the cornea 61 is according to the shape of the base curve 30. At the same time, the eye epithelial cell fluid located near the pressing force will flow away from the pressing force.
The stable curve 50 is positioned on the outer periphery of the inner surface 20 with an asymmetrical shape. When the base curve 30 generates the pressing force to the cornea 61 and deforms the cornea 61, the cornea 61 corresponding to the base curve 30 in the suction pump room SR will be compressed and deformed inward. And the cornea 61 corresponding to reverse curve 40 and/or the base curve 30 in the suction pump room SR will deform in the direction of the reverse curve 40 and/or the base curve 30. The deformation of the cornea 61 is according to the shape of the base curve 30.
The suction pump orthokeratology lens 100 is positioned on the eye 60 through the stable curve 50. The suction pump orthokeratology lens 100 can be accurately positioned on the eye 60 through the stable curve 50, and the reverse curve 40 can be located on the cornea 61. The stable curve 50 is provided on the outer periphery of the inner surface 20, so that the reverse curve 40 is provided between the base curve 30 and the stable curve 50. When the stable curve 50 contacts the eye 60, the stable curve 50 has at least one contact point 51, and the contact point 51 is in contact with the cornea 61 so that a gap is formed between the stable curve 50 and the eye 60 to generate a tiny suction force which does not affect stability. The tiny suction force causes the stable curve 50 to slidably contact the eye 60, and positions the suction pump orthokeratology lens 100 on the eye 60.
In addition, the stable curve 50 can help the epithelial cell fluid of the eye 60 to flow in the direction of the reverse curve 40 and/or the base curve 30 to perform the shaping treatment of the cornea 61.
In some embodiment, the stable curve 50 has at least two contact points 51, and each of the contact points 51 is in contact with the cornea so that a gap is formed between the stable curve 50 and the eye 60 to generate a tiny suction force which does not affect stability. It guides the epithelial cell fluid of the eye flow toward the middle position, so that the cornea 61 can be shaped more effectively.
Based on the above structure, when the user wears the suction pump orthokeratology lens 100, the base curve 30 will press the eye 60 to deform the eye 60 inwardly. Meanwhile, the cornea 61 will deform toward the position of the reverse curve 40 and/or the base curve 30, and shape the cornea 61 of the eye 60 to achieve the effect of correcting vision.
As shown in
The above detailed descriptions are specific descriptions of possible embodiments of the present invention, but these embodiments are not intended to limit the scope of the present invention. Any equivalent implementation or change without departing from the technical spirit of the present invention should be covered in the scope of this patent.
Number | Date | Country | Kind |
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109212846 | Sep 2020 | TW | national |