Ophthalmic lens having increased resistance to hot and humid environment
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United States of America Patent
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Sep 27, 2022
Grant Date -
Jun 6, 2019
app pub date -
Aug 21, 2017
filing date -
Aug 23, 2016
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Abstract
The invention concerns an ophthalmic lens having an increased resistance to thermal and hygroscopic stresses, said ophthalmic lens comprising a substrate, at least one main face of which is coated with a siloxane-based anti-abrasion hardcoat, characterized in that said ophthalmic lens further comprises at least one protective layer of an organic-inorganic material directly in contact with said hardcoat, said protective layer of organic-inorganic material having a Young's modulus higher than 20 GPa, preferably of at least 25 GPa.
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