Soft contact lenses

Details Soft contact lenses Soft contact lenses

G - Physics

02

B

88/40, 400/9046,

G02B 1/04 (2006.01)

Patent

CA 1242549

ABSTRACT: A soft contact lens made of a copolymer composed essentially of: (a) from about 30 to about 60 parts by weight of at least one monomer selected from the group consisting of long chain alkyl acrylates and methacrylates represented by the general formula: Image where R1 is a hydrogen atom or a methyl group, and R2 is a straight chained or branched alkyl group having from 5 to 18 carbon atoms; (b) from about 40 to about 70 parts by weight of at least one hydrophilic monomer selected from the group consisting of dimethylacrylamide, N-vinylpyrrolidone, a hydroxyalkyl acrylate and a hydroxyalkyl methacrylate; and (c) from about 0.05 to about 2.0 parts by weight of a cross-linking agent; and having a water content of from about 25 to about 50% by weight.

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