Hard contact lens material consisting of alkyl fumarate and silicon-alkyl fumarate copolymers
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United States of America Patent
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Sep 19, 1989
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N/A
app pub date -
Oct 24, 1986
filing date -
Oct 25, 1985
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Expired
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Abstract
A hard contact lens material comprising a copolymer made of at least two kinds of fumaric acid diester at least one of which is a dialkyl fumarate as main components. The hard contact lens material has high oxygen permeability, transparance and excellent physical properties.
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