Patent ID: 8408697
Filing Date: 2013-04-02
Classification: C08F

Abstract:
1. A high refractive index oxygen permeable contact lens comprising a cross linked polymeric material comprising: an alkyl acrylate present in an amount of between about 7% to about 15% by weight of the cross linked polymeric material; a fluoro acrylate present in an amount of between about 1% to about 4% by weight of the cross linked polymeric material; a silicone acrylate present in an amount of between about 10% to about 70% by weight of the cross linked polymeric material; n-vinyl carbazole present in an amount of between about 20% to about 40% by weight of the cross linked polymeric material; a cross-linking agent present in an amount of between about 0.1% to about 15% by weight of the cross linked polymeric material; and n-vinyl pyrrolidone present in an amount of between about 2% to about 20% by weight of the cross linked polymeric material; wherein the weight percentage of the n-vinyl pyrrolidone is about one third of the weight percentage of the n-vinyl carbazole; and wherein the contact lens has an index of refraction that is greater than 1.51 and an oxygen permeability of greater than 22 Barrers.