Contact lens having improved dimensional stability
AssigneeBenz Research and Development Corporation
InventorsPatrick H. Benz, Jose A. Ors
Life of this patent
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Abstract
A contact lens and a contact lens blank having increased dimensional stability are constructed from a copolymer of 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate, wherein the copolymer of 2,3-dihydroxypropyl methacrylate and 2-hydroxyethyl methacrylate has either an absolute water balance ratio greater than 8 or a relative water balance ratio greater than 2 relative to a polymer of 2-hydroxyethyl methacrylate.
Claims12
A contact lens having increased dimensional stability, formed from 2,3-dihydroxypropyl methacrylate, 2-hydroxyethyl methacrylate, and a crosslinker and having a relative water balance ratio greater than two relative to a polymer of 2-hydroxyethyl methacrylate.
Dependencies are inferred from the claim text.