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Extended Wear Ophthalmic Lens

  • US 20090046242A1
  • Filed: 10/16/2008
  • Published: 02/19/2009
  • Est. Priority Date: 09/06/1994
  • Status: Abandoned Application
First Claim
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1. A contact lens comprising a polymeric material formed from a prepolymerization mixture including:

  • (a) at least one oxyperm material containing hydrophilic groups, wherein the at least one oxyperm material is a polydimethylsiloxane-containing macromer or monomer;

    (b) at least one ionperm material selected from the group consisting of acrylates, 2-hydroxyethyl methacrylate, acrylamide, methacrylamide, dimethylacrylate, poly(ethyleneglycol), N-vinylpyrrolidone, and mixtures thereof, and(c) a cross-linking agent selected from the group consisting of allyl(meth)acrylate, lower alkylene glycol di(meth)acrylate, poly lower alkylene glycol di(meth)acrylate, lower alkylene di(meth)acrylate, divinyl ether, divinyl sulfone, divinylbenzene, trivinylbenzene, trimethylolpropane tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, bisphenol A di(meth)acrylate, methylenebis(meth)acrylamide, triallyl phthalate, and diallyl phthalate,the contact lens characterized by having a tensile modulus of less than about 3.0 MPa and producing less than 10% corneal swelling after a period of continuous wear of 7 days including normal sleep periods.

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