Patent ID: 7790825

Claim:
An ophthalmic device material comprising a) device-forming monomers consisting essentially of a single polymerizable monomer of the structure: wherein: Z is H or CH 3 ; X is (CH2) m or O(CH 2 CH 2 O) n ; m is 2-6; n is 1-6; and Ar is phenyl which can be unsubstituted or substituted with CH3, C2H5, n-C3H7, iso-C3H7, OCH3, C6H11, Cl, Br, C6H5, or CH2C6H5; b) a polymerizable cross-linking agent; and c) a non-polymerizable block copolymer surfactant selected from the group consisting of: a propylene oxide-ethylene oxide-propylene oxide block copolymer surfactant having an average molecular weight of approximately 3600 and an ethylene oxide unit content of approximately 40% by weight, and an ethylene oxide-propylene oxide-ethylene oxide block copolymer surfactant having an average molecular weight of approximately 5900 and a ethylene oxide unit content of approximately 40% by weight.