Method for making silicone hydrogel contact lenses
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United States of America Patent
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Oct 13, 2015
Grant Date -
Jun 7, 2012
app pub date -
Dec 2, 2011
filing date -
Dec 6, 2010
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Abstract
The invention provides a method for washing, with a water-based system, reusable molds for making silicone hydrogel contact lenses. The water-based washing system comprises an ethoxylated silicone polyether surfactant. The water-based system of the invention can effectively wash away silicone-containing components and other components of a lens formulation left behind on the molding surfaces of a reusable mold, after removing a silicone hydrogel contact lens cast molded in the reusable mold.
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