CONTACT LENS WITH A HYDROPHILIC LAYER
First Claim
1. A method of making a hydrogel coated contact lens comprising:
- reacting an outer surface of a lens core of a contact lens with a hydrophilic polymer population comprising a first polyacrylamide species and a second polyacrylamide species, wherein the first polyacrylamide species comprises a reactive amine moiety at a first portion that forms a covalent attachment to the outer surface of the contact lens;
reacting the first polyacrylamide species with the second polyacrylamide species, wherein the second polyacrylamide species comprises a reactive carboxyl moiety that forms a covalent bond to a second portion of the first polyacrylamide species in a second covalent reaction; and
forming a hydrogel coating that is at least partially cross-linked, wherein the first polyacrylamide species is at least partially cross-linked to the second polyacrylamide species.
3 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the technology relate to a contact lens having a core that is coated by a hydrogel layer, and to methods of making such a lens. The coated lens can include a rigid gas permeable contact lens. The coated lens can also include a hybrid silicone and rigid gas permeable contact lens. In one aspect, embodiments provide for a coated contact lens comprising a lens core with a water equilibrium constant of less than about 2% comprising an outer surface; and a hydrogel layer covalently attached to at least a portion of the outer surface, the hydrogel layer adapted to contact an ophthalmic surface, wherein the hydrogel layer comprises a hydrophilic polymer population of one or more species.
2 Citations
20 Claims
-
1. A method of making a hydrogel coated contact lens comprising:
-
reacting an outer surface of a lens core of a contact lens with a hydrophilic polymer population comprising a first polyacrylamide species and a second polyacrylamide species, wherein the first polyacrylamide species comprises a reactive amine moiety at a first portion that forms a covalent attachment to the outer surface of the contact lens; reacting the first polyacrylamide species with the second polyacrylamide species, wherein the second polyacrylamide species comprises a reactive carboxyl moiety that forms a covalent bond to a second portion of the first polyacrylamide species in a second covalent reaction; and forming a hydrogel coating that is at least partially cross-linked, wherein the first polyacrylamide species is at least partially cross-linked to the second polyacrylamide species. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification