WETTABLE SILICONE HYDROGEL CONTACT LENSES

摘要

Ophthalmic ally acceptably wettable silicone hydrogel contact lenses are described. The lenses are derived from a polymerizable composition including a first siloxane monomer represented by formula (I): wherein m, n, R1 and R2 are as defined herein, the first siloxane monomer having a number average molecular weight of from 400 daltons to 700 daltons; and a second siloxane monomer having a number average molecular weight greater than 7,000 daltons; wherein a total amount of siloxane monomers present in the polymerizable composition is from 30 unit parts to 50 unit parts; the lenses also include units derived from at least one hydrophilic amide monomer having one N-vinyl group that is present in the polymerizable composition in an amount from 30 to 60 unit parts. The lenses have ophthalmically acceptably wettable lens surfaces when fully hydrated.