CONTACT LENS WITH SPATIALLY HETEROGENOUS SURFACE PATTERNS FOR IMPROVED LUBRICITY
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United States of America Patent
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Issued Date -
Jun 4, 2015
app pub date -
Jul 12, 2013
filing date -
Jul 13, 2012
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Abstract
A surface patterned contact lens is composed of a silicon hydrogel and has one or more surface regions that are patterned with nano-scale roughness features, micro-wells, micro-protrusions, and/or micro-channels. The micro-wells, micro-protrusions, and/or micro-channels have depths and heights that are on nanometer dimensions. The nano-scale roughness features have dimensions less than 200 nm in width, depth or height. The surface patterns do not diffract light and do not inhibit the clarity that can be detected by the eye. A method of preparing the surface patterned contact lens involves molding, where a complementary negative of the surface patterned contact lens is displayed by the mold.
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