Patent ID: 8362177

Claim:
An ophthalmic device material comprising a) 50-93% (w/w) of a polymerizable monomer of structure (I): wherein: A is H or CH 3 ; B is (CH 2 ) m , or [O(CH 2 ) 2 ] z ; m is 2-6; z is 1-10; Y is nothing, O, S, or NR′, provided that if Y is O, S, or NR′, then B is (CH 2 ) m ; R′ is H, CH 3 , C n′ H 2n′+1 , iso-OC 3 H 7 , C 6 H 5 , or CH 2 C 6 H 5 ; n′=1-10; w is 0-6, provided that m+w≦8; and D is H, Cl, Br, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, C 6 H 5 , or CH 2 C 6 H 5 ; b) 5-20% (w/w) of a benzhydryl methacrylate monomer of structure (II): wherein: E and F are independently H, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, CF 3 , F, Cl, Br, or N(CH 3 ) 2 ; and c) a polymerizable cross-linking agent.