Claims
- 1. An intracomeal lens, comprising:
a) a base lens made from a first hydrogel material and having a refractive index greater than the refractive index of corneal tissue; b) a diffractive surface formed on the base lens; C) a coating covering the diffractive surface, the coating made from a second hydrogel material having a refractive index that is less than the refractive index of the first material; and d) an outer peripheral edge having a relatively flat posterior surface, a bicurved anterior surface and a relatively straight portion connecting the anterior surface to the posterior surface.
- 2. The intracomeal lens of claim 1 wherein the first material has a refractive index of at least 1.4.
- 3. The intracorneal lens of claim 1 wherein second material has a refractive index of approximately 1.37.
- 4. The intracomeal lens of claim 1 wherein the first material has a water content of at least 50%.
- 5. The intracorneal lens of claim 1 wherein the second material has a water content of at least 65%.
- 6. The intracorneal lens of claim 2 wherein the first material has a water content of at least 50%.
- 7. The intracorneal lens of claim 3 wherein the second material has a water content of at least 65%.
- 8. The intracomeal lens of claim 1 wherein the first material comprises a copolymer of N-vinyl-pyrrolidone and 2-Phenylethyl methacrylate.
- 9. The intracomeal lens of claim 1 wherein the second material comprises a polymer of glyceryl methacrylate.
- 10. The intracomeal lens of claim 1 wherein the base lens has a diameter of at least 5 millimeters.
- 11. The intracomeal lens of claim 1 wherein the base lens is a monofocal optic.
- 12. The intracomeal lens of claim 1 wherein the base lens is a multifocal optic.
- 13. The intracomeal lens of claim 1 wherein the relatively straight portion has a length of approximately between 0.005 mm and 0.03 mm.
- 14. An intracomeal lens, comprising:
a) a base lens made from a first hydrogel material and having a refractive index greater than 1.40; b) a diffractive surface formed on the base lens; and c) a coating covering the diffractive surface, the coating made from a second hydrogel material having a refractive index that is less than 1.40; and d) an outer peripheral edge having a relatively flat posterior surface, a bicurved anterior surface and a relatively straight portion connecting the anterior surface to the posterior surface.
- 15. The intracomeal lens of claim 14 wherein the first material has a water content of at least 50%.
- 16. The intracomeal lens of claim 14 wherein the second material has a water content of at least 65%.
- 17. The intracomeal lens of claim 14 wherein the first material comprises a copolymer of N-vinyl-pyrrolidone and 2-Phenylethyl methacrylate.
- 18. The intracomeal lens of claim 14 wherein the second material comprises a polymer of glyceryl methacrylate.
- 19. The intracomeal lens of claim 14 wherein the base lens is a monofocal optic.
- 20. The intracomeal lens of claim 14 wherein the base lens is a multifocal optic.
- 21. The intracomeal lens of claim 14 wherein the relatively straight portion has a length of approximately between 0.005 mm and 0.03 mm.
- 22. An intracorneal lens, comprising:
a) a base lens made from a hydrogel material and having a refractive index greater than the refractive index of corneal tissue; b) a diffractive surface formed on the base lens; and c) an outer peripheral edge having a relatively flat posterior surface, a bicurved anterior surface and a relatively straight portion connecting the anterior surface to the posterior surface.
Parent Case Info
[0001] This application is a continuation-in-part application of U.S. patent application Ser. No. 08/908,230, filed Aug. 7, 1997, currently co-pending.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
08908230 |
Aug 1997 |
US |
Child |
09798200 |
Mar 2001 |
US |