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CONTACT LENS WITH A HYDROPHILIC LAYER

  • US 20190310495A1
  • Filed: 06/20/2019
  • Published: 10/10/2019
  • Est. Priority Date: 11/15/2013
  • Status: Active Grant
First Claim
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1. A method of making a hydrogel coated contact lens comprising:

  • reacting an outer surface of a lens core of a contact lens with a hydrophilic polymer population comprising a first polyacrylamide species and a second polyacrylamide species, wherein the first polyacrylamide species comprises a reactive amine moiety at a first portion that forms a covalent attachment to the outer surface of the contact lens;

    reacting the first polyacrylamide species with the second polyacrylamide species, wherein the second polyacrylamide species comprises a reactive carboxyl moiety that forms a covalent bond to a second portion of the first polyacrylamide species in a second covalent reaction; and

    forming a hydrogel coating that is at least partially cross-linked, wherein the first polyacrylamide species is at least partially cross-linked to the second polyacrylamide species.

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