PRODUCTION OF OPTHTHALMIC LENSES WITH PROTECTED MICROSTRUCTURES
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United States of America Patent
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Oct 1, 2015
app pub date -
Oct 16, 2013
filing date -
Oct 17, 2012
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Abstract
A method for preparing ophthalmic lenses, which have a microstructure on at least one side, particularly a diffractive microstructure for colour fringe correction, wherein the invention provides in particular a method which substantially reduces any adverse effect on the microstructure by damage or soiling during the manufacture of an ophthalmic lens and during the use thereof. Thus a method according to the invention for manufacturing an ophthalmic lens comprises provision of a microstructure on at least one first surface of an ophthalmic lens glass and application of at least one protective coating on the ophthalmic lens glass in such a manner that the protective coating at least partially covers the microstructure, wherein the protective coating has a refractive index which differs from the refractive index of the ophthalmic lens glass.
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