Wettable silicone hydrogel contact lenses

Abstract

Improved silicone-contg. hydrogel contact lenses with enhanced wettability comprise a silicone-contg. monomer, hydrophilic monomers, and a relatively non-polar ring-contg. monomer able to be converted to a highly polar amino acid upon hydration. A contact lens was prepd. from IDS3H (a urethane prepolymer), diethylene glycol, polysiloxanediol, and 2-hydroxyethyl methylacrylate 35; methacryloxypropyl tris(trimethylsiloxy)silane 35, N,N-dimethylacrylamide 30; hexanol 40; , benzoin Et ether 0.2; and 2-vinyl-4,4'-dimethyl-2-oxazolin-5-one 5 parts. The water content of the lens was 39%, the O permeability was 70Dk, and tensile modulus was 130 g/mm2. [on SciFinder (R)]