Ophthalmic lenses and compositions and methods for producing same
View Patent ↗Ophthalmic lenses, such as corneal contact lenses, include a lens body made of a composition including a lens body made of a composition including a first crosslinked polymer material which is water swellable, and a second polymeric material, other than the first material, selected from water soluble polymeric materials, water swellable polymeric materials and mixtures thereof. The second material is physically immobilized by the first material. Such lenses provide increased water retention and/or increased water content and/or increased modulus and/or reduced friction which increases lens wearer comfort. Compositions and methods for providing such lenses and compositions are also provided.
1. A contact lens comprising:
a lens body comprising a composition including a silicon-containing crosslinked polymer material which is water swellable; and a polymeric material, other than the silicon-containing crosslinked polymer material, selected from the group consisting of water soluble polymeric materials, water swellable polymeric materials and mixtures thereof, the polymeric material being distributed in the silicon-containing crosslinked polymer material.
2. The contact lens of claim 1 wherein the polymeric material is immobilized by the silicon-containing crosslinked polymer material.
3. The contact lens of claim 1 wherein the polymeric material is physically immobilized by the silicon-containing crosslinked polymer material.
4. The contact lens of claim 1 wherein the lens body exhibits at least one of increased water retention, increased equilibrium water content, increased modulus and reduced surface evaporation of water relative to a substantially identical lens body without the polymeric material.
5. The contact lens of claim 1 which is effective in reducing the risk of at least one of discomfort and irritation to an eye wearing the lens relative to wearing a substantially identical lens without the polymeric material.
6. The contact lens of claim 1 wherein the polymeric material is crosslinked.
7. The contact lens of claim 1 wherein the polymeric material is selected from the group consisting of water soluble polymeric material and mixtures thereof.
8. The contact lens of claim 1 wherein the silicon-containing crosslinked polymer material is present in an amount in a range of about 10% to about 99.9% by weight, based on the water-free weight of the contact lens; and the polymeric material is present in an amount in a range of about 0.1% to about 90%, by weight, based on the water-free weight of the contact lens.
9. The contact lens of claim 1 wherein the silicon-containing crosslinked polymer material is selected from the group consisting of hydrogel-forming polymers and mixtures thereof.
10. The contact lens of claim 1 wherein the silicon-containing crosslinked polymer material includes units derived from at least one ethylenically unsaturated monomeric component.
11. The contact lens of claim 1 wherein the silicon-containing crosslinked polymer material includes units derived from at least one monomeric component selected from the group consisting of methacrylate-containing monomeric components, acrylate-containing monomeric components and mixtures thereof.
12. The contact lens of claim 1 wherein the polymeric material is substantially not covalently bonded to the silicon-containing crosslinked polymer material.
13. The contact lens of claim 1 wherein the polymeric material is covalently bonded to the silicon-containing crosslinked polymer material.
14. The contact lens of claim 1 wherein the polymeric material includes units derived from at least one ethylenically unsaturated monomeric component.
15. An contact lens comprising:
a lens body comprising a composition including a crosslinked polymer material which is water swellable; and a polymeric material, other than the crosslinked polymer material, selected from the group consisting of water soluble polymeric materials, water swellable polymeric materials and mixtures thereof, the lens body exhibiting increased retention of water relative to a substantially identical lens body without the polymeric material.
16. The contact lens of claim 15 wherein the polymeric material is distributed in the crosslinked polymer material.
17. The contact lens of claim 15 wherein the polymeric material is physically immobilized by the crosslinked polymer.
18. The contact lens of claims 15 wherein the lens body exhibits increased modulus relative to a substantially identical lens body without the polymeric material.
19. The contact lens of claim 15 wherein the crosslinked polymer material comprises a silicon-containing crosslinked polymer component.
20. The contact lens of claim 15 which is effective in reducing the risk of at least one of discomfort and irritation to an eye wearing the lens relative to wearing a substantially identical lens without the polymeric material.
21. The contact lens of claim 15 wherein the polymeric material is crosslinked.
22. The contact lens of claim 15 wherein the polymeric material is selected from the group consisting of water soluble polymeric material and mixtures thereof.
23. The contact lens of claim 15 wherein the crosslinked polymer material is present in an amount in a range of about 10% to about 99.9% by weight, based on the water-free weight of the contact lens; and the polymeric material is present in an amount in a range of about 0.1% to about 90%, by weight, based on the water-free weight of the contact lens.
24. The contact lens of claim 15 wherein the crosslinked polymer material is selected from the group consisting of hydrogel-forming polymers and mixtures thereof.
25. The contact lens of claim 15 wherein the crosslinked polymer material includes units derived from at least one ethylenically unsaturated monomeric component.
26. The contact lens of claim 15 wherein the crosslinked polymer material includes units derived from at least one monomeric component selected from the group consisting of methacrylate-containing monomeric components, acrylate-containing monomeric components and mixtures thererof.
27. The contact lens of claim 15 wherein the polymeric material is substantially not covalently bonded to the crosslinked polymer material.
28. The contact lens of claim 15 wherein the polymeric material is covalently bonded to the crosslinked polymer material.
29. The contact lens of claim 15 wherein the polymeric material includes units derived from at least one ethylenically unsaturated monomeric component.