Patent ID: 7892284

Claim:
An intraocular lens having an optic portion having a front surface and a back surface and both the front surface and the back surface are surface treated, the front surface is surface-treated to inhibit the property of adhering to a protein, and the back surface is surface-treated to improve the property of adhering to a protein, said front surface and said back surface being different from each other in the property of adhering to a protein and satisfying the relationship of the expression (x), PA F <PA B (x) wherein PA F is the property of adherence of said front surface to fibronectin and PA B is the property of adherence of said back surface to fibronectin in a fibronectin adherence test, wherein the optic portion is formed of one piece, wherein the front surface of the optic portion is a surface-treated front surface coated with a copolymer having a recurring unit of the general formula (I), wherein R 1 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R 2 is a hydrogen atom, a hydroxyl group, a hydrocarbyloxy group, —Si(OR 4 ) 3 in which R 4 is a lower alkyl group or trimethylsilyl, or a group represented by in which R 5 is methyl, phenyl or trimethylsiloxy and m is an integer of 1 to 100, R 3 is an alkylene group, a is 0.03 to 0.70, b is 0.30 to 0.97 and n is an integer of 2 or more, and having a number average molecular weight of 5,000 or more, the copolymer having been obtained from 2-methacryloyloxyethyl phosphorylcholine and (meth)acrylic ester.