Ocular membrane and method for preparation thereof
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United States of America Patent
Stats
-
Jan 8, 1980
Issued Date -
N/A
app pub date -
Nov 4, 1977
filing date -
Apr 15, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composition which is hydrophobic but possesses excellent wettability comprising a copolymer of a polysiloxane and an ester of glycidyl alcohol and an organic acid. This copolymer is suitable for the manufacture of ocular membranes worn in contact with the eye which present excellent oxygen permeability and which can be worn for extremely long periods of time and then disposed of. A method of preparing the ocular membranes is disclosed, in which the composition is placed between disposable molds and cured therein. The cured, mechanically and optically finished ocular membranes are recovered by the destruction of said molds and without secondary operations. The ocular membrane is a flexible, oxygen-permeable, membrane, adapted to be inserted on the eye and worn thereon continuously for periods of more than one month.
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