Patent ID: 9075187
Filing Date: 2015-07-07
Classification: G02B,G02C

Abstract:
1. A UV blocking contact lens, blocking more than 70% UVA light and more than 95% UVB light, containing entrained polyvinylpyrrolidone and having an equilibrium water content of about 42.3% to about 59.1% when fully hydrated, wherein the lens is formed from a reaction mixture comprising at least N-vinylpyrrolidone and at least one other comonomer and a free-radical polymerizable, substituted or unsubstituted, Bis O-hydroxybenzophenone, wherein polyvinylpyrrolidone is formed in situ during cure of the reaction mixture, and wherein the reaction mixture from which the lens is formed comprises an organosilicon-containing hydrophobic monomer present at between 0.1 to 75.8 percent by weight.