A method for the production of a soft contact lens

Details A method for the production of a soft contact lens A method for the production of a soft contact lens

C - Chemistry, Metallurgy

08

F

C08F 220/56 (2006.01) G02B 1/04 (2006.01) G02C 7/04 (2006.01)

Patent

CA 2161110

According to this method of obtaining a solid contact lens, an acrylamide and N,N'-methylene-bis-acrylamide are first purified and then used to prepare solutions of 310-750 g/l acrylamide, 05-9.0 g/l N,N'-methylene-bis-acrylamide, 0.1-3.0 g/l N,N,N'N'- tetramethylethylenediamine, and 0.14.0 g/l ammoniuim persulphate. These solutions ale mixed and placed in the form to carry out simultaneous polymerizations and cross-linking, over a period sufficient for the production of a hydrogel material in the shape of a soft contact lens. After the lens is retrieved from the form, it is saturated with water until equilibrium state.

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