Systems and methods for producing silicone hydrogel contact lenses from a polymerizable composition
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United States of America Patent
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Oct 30, 2012
Grant Date -
Dec 3, 2009
app pub date -
Aug 7, 2006
filing date -
Aug 9, 2005
priority date (Note) -
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Abstract
Systems and methods of manufacturing ophthalmic lenses, for example, silicone hydrogel contact lenses, are provided. The present systems and methods provide certain amounts of ultraviolet light to contact lens mold assemblies that comprise a silicone hydrogel precursor composition. For example, the systems and methods may provide ultraviolet light at an intensity from 20 μW/cm2 to 4000 μW/cm2. The ultraviolet light intensity can be provided as substantially uniform levels to provide consistent curing for batches of silicone hydrogel contact lenses.
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