CPC G02B 1/043 (2013.01) [B29D 11/00048 (2013.01); C08F 283/122 (2013.01); C08F 290/068 (2013.01); C08G 77/52 (2013.01); C08J 3/075 (2013.01); C08L 83/14 (2013.01); G02C 7/049 (2013.01); B29K 2083/00 (2013.01); B29K 2105/0061 (2013.01); C08G 2210/00 (2013.01); C08J 2383/04 (2013.01); C08J 2383/08 (2013.01); C08L 2205/025 (2013.01)] | 6 Claims |
1. A process for making a composite contact lens, comprising:
(a) dosing a first silicone hydrogel formulation containing at least one N-alkyl methacrylamide and at least one silicone-containing component into a first mold,
(b) partially curing the first silicone hydrogel formulation into a gel,
(c) dosing a second silicone hydrogel formulation into the first mold
(d) allowing time for the second silicone hydrogel formulation to imbibe into the gel,
(e) placing a second mold on top of the first mold, and
(f) fully curing the combination to form the composite contact lens,
wherein the composite contact lens contains a central region comprised of a first silicone hydrogel derived from the first silicone hydrogel formulation and a peripheral region comprised of a second silicone hydrogel derived from the second silicone hydrogel formulation, and
wherein the first silicone hydrogel has a modulus of at least about 1000 psi and a water content of at least about 10%.
|