Contact lens casting
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United States of America Patent
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-
Oct 27, 1992
Issued Date -
N/A
app pub date -
Aug 19, 1991
filing date -
Aug 2, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Hydrophobic casting moulds are treated with electrical discharge, such as corona discharge, to provide enhanced compatibility with hydrophilic objects introduced into the mould, without interfering with the release properties of the mould. A preferred embodiment involves treatment of contact lens casting moulds with corona discharge to provide improvements in the lens manufacturing procedure, as well as enhancement in the quality of the contact lenses themselves. The invention is particularly applicable to the production of contact lenses having a colored iris pattern imprinted thereon.
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Family
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Cited Art Landscape
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