Patent ID: 8487058

Claim:
A silicone hydrogel contact lens, comprising: a polymeric lens body that is the reaction product of a miscible polymerizable composition, said polymerizable composition comprising (a) a first siloxane monomer represented by formula (1): wherein m of formula (1) represents one integer from 3 to 10, n of formula (1) represents one integer from 1 to 10, R 1 of formula (1) is an alkyl group having from 1 to 4 carbon atoms, and each R 2 of formula (1) is independently either a hydrogen atom or a methyl group, the first siloxane monomer having a number average molecular weight of from 400 daltons to 700 daltons; (b) a second siloxane monomer having a number average molecular weight greater than 7,000 daltons and being represented by formula (2): wherein R 1 of formula (2) is selected from either hydrogen atom or a methyl group; R 2 of formula (2) is selected from either of hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms; m of formula (2) represents an integer of from 0 to 10; n of formula (2) represents an integer of from 4 to 100; a and b represent integers of 1 or more; a+b is equal to 20-500; b/(a+b) is equal to 0.01-0.22; and the configuration of siloxane units includes a random configuration, and wherein a total amount of siloxane monomers present in the polymerizable composition is from 30 unit parts to 50 unit parts by weight; and (c) at least one hydrophilic amide monomer having one N-vinyl group, the hydrophilic amide monomer being present in the polymerizable composition in an amount from 30 unit parts to 60 unit parts by weight; wherein the contact lens has ophthalmically acceptably wettable lens surfaces when fully hydrated.