Contact lens having improved dimensional stability
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United States of America Patent
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May 20, 2003
Issued Date -
N/A
app pub date -
Jun 1, 2001
filing date -
Apr 14, 1995
priority date (Note) -
In Force
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Abstract
A contact lens and a contact lens blank having increased dimensional stability are constructed from a copolymer of 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate, wherein the copolymer of 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate has either an absolute water balance ratio greater than 8 or a relative water balance ratio greater than 2 relative to a polymer of 2-hydroxyethyl methacrylate.
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