Molding method for manufacturing thin thermoplastic lenses
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United States of America Patent
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-
Sep 4, 2001
Grant Date -
N/A
app pub date -
Mar 25, 1999
filing date -
Mar 25, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed are novel molding methods for manufacturing thin thermoplastic lenses and, in particular, minus ophthalmic lenses that have thickness of about 1 mm or less at the thinnest point thereof. The molding methods disclosed provide for lenses which lack any abrasion or polishing artifacts on the surface and also lack any negative fining marks below the nominal surface.
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