Process for making silicone containing hydrogel lenses

  • US 5,260,000 A
  • Filed: 08/03/1992
  • Issued: 11/09/1993
  • Est. Priority Date: 08/03/1992
  • Status: Expired due to Term
First Claim
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1. A process for preparing silicone hydrogel contact lenses, said process comprising:

  • (a) providing a monomeric mixture comprising a silicone-containing monomer, a hydrophilic monomer and an organic diluent;

    (b) charging the monomeric mixture to a mold and curing the formulation in the mold to obtain a shaped article;

    (c) removing diluent from the shaped article to improve machineability of the shaped article; and

    (d) machining the shaped article to obtain a contact lens having a desired configuration.

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