Contact lens and compositions

Details Contact lens and compositions Contact lens and compositions

1983-05-06

1984-07-31

Wong, Jr., Harry

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

351160H, 5263075, 526312, C08F22020, G02C 704

Patent

active

044631480

ABSTRACT:
A soft contact lens having in preferred embodiment an elliptical inside surface which has a numerical eccentricity of 0.2 to 0.5 and a zenith radium of curvature of 8.0 to 8.4 mm. It preferably consists of a copolymer comprising of 50% to 90% hydroxyethyl-methacrylate (HEMA) by weight, 2% to 20% one or more unsaturated carboxylic acids, 2% to 20% one or more base monomers, 5% to 25% aliphatic acrylate or methacrylate, and 0.1% to 1% of a dialkylene-glycol-dimethacrylate crosslinker.

REFERENCES:
patent: 3937680 (1976-02-01), de Carle
patent: 4036788 (1977-07-01), Steckler

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