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US 8,476,337 B2Granted
Wettable silicone hydrogel contact lenses and related compositions and methods
AssigneeCooperVision International Holding Company, LP
InventorsCharlie Chen, Ye Hong, Nick Manesis
Life of this patent
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Abstract
Silicone hydrogel contact lenses having ophthalmically acceptable surface wettabilities are obtained from pre-extracted polymerized silicone hydrogel contact lens products having relatively large amounts of removable or extractable materials. The silicone hydrogel contact lenses can be obtained from non-polar resin based contact lens molds and without surface treatments or an interpenetrating polymeric network of a polymeric wetting agent. Related lens products, polymerizable compositions, and methods are also described.
Claims8
A silicone hydrogel contact lens, comprising:
- a polymerized silicone hydrogel contact lens formed from polymerization of a polymerizable lens precursor composition, the precursor composition comprising
- a silicone macromer,
- a non-silicon containing monomer composition,
- allyloxyethanol, that serves as a chain transfer agent during said polymerization,
- a polymerization initiator, and
- an ultraviolet absorber and/or a tinting agent, wherein at least one of the silicone macromer and the non-silicon containing monomer composition comprises at least two polymerizable groups.
3 more elements
Dependencies are inferred from the claim text.