Patent ID: 9465234
Filing Date: 2016-10-11
CPC Classification: C07D,C09K,G02B,G02C,Y10T

Claim Text:
1. A contact lens formed from a hydrogel having a water content of at least about 20% and formed from a reaction mixture comprising at least one hydrophilic monomer and at least one silicone containing component, said contact lens comprising at least one photochromic material represented by graphic formulas I and II or a mixture thereof, comprising an indeno-fused naphthopyran comprising (a) a pi-conjugation extending group bonded to the 11-position of said indeno-fused naphthopyran, said pi-conjugation extending group having at least one pendent halo-substituted group bonded thereto, said pi-conjugation extending group extending the pi-conjugation system of said indeno-fused naphthopyran, wherein the 13-position of said indeno-fused naphthopyran is substantially free of spiro-substituents