Method for cast molding contact lenses with a rounded edge form

  • US 6,431,706 B1
  • Filed: 07/06/2000
  • Issued: 08/13/2002
  • Est. Priority Date: 07/06/2000
  • Status: Expired due to Term
First Claim
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1. A method for producing a contact lens product, the method comprising:

  • providing a back surface tool including a first surface portion generally corresponding to a desired contact lens posterior face and a convexly curved second surface portion circumscribing the first surface portion;

    positioning the back surface tool in a molding apparatus;

    introducing a polymeric moldable material into the molding apparatus and subjecting the moldable material to conditions effective to form a first polymeric mold section having a negative impression of the first and second surface portions of the back surface tool;

    assembling the first polymeric mold section with a second mold section to form a lens shaped cavity therebetween; and

    forming a contact lens member in the lens shaped cavity of the assembled mold sections.

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