Alcon Inc.
SILICONE HYDROGEL LENSES WITH WATER-RICH SURFACES
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Abstract:
The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.
Status:
Application
Type:
Utility
Filling date:
23 May 2022
Issue date:
8 Sep 2022