UV blocking lenses and material containing benzotriazoles and benzophenones
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United States of America Patent
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Jun 12, 2001
Grant Date -
N/A
app pub date -
Jul 21, 1998
filing date -
Jul 21, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Contact lenses, intraocular lenses and transparent plastic with enhanced UV blocking to meet ANSI Class 1 specifications include enhanced effective amounts of two different UV absorbing compounds. One UV absorber is a benzotriazole derivative, and the other UV absorber is a benzophenone derivative. The lenses are made from a polymer that incorporates both of these UV absorbers.
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