Method of making contact lens blanks
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United States of America Patent
Stats
-
Jul 3, 1984
Grant Date -
N/A
app pub date -
Feb 15, 1983
filing date -
Feb 15, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lens blank having a finished optical surface is cast from a liquid monomer beneath an optical surfaced mold made from a resinous material which adheres to the polymerized lens material. The lower mold having a non-optical surface is made from a resinous material which will not adhere to the polymerized solid lens material. Ultra sonic vibrations are used to dislodge and clean particulate matter from the optical mold before polymerization of the liquid lens monomer.
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Family
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Cited Art Landscape
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