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Methods and apparatus for producing ophthalmic lenses

  • US 5,320,006 A
  • Filed: 04/30/1992
  • Issued: 06/14/1994
  • Est. Priority Date: 09/27/1991
  • Status: Expired due to Term
First Claim
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1. In a method of producing an ophthalmic lens, wherein an initial curvature is cut into a lens blank and is thereafter finished by a finishing tool having finishing curve characteristics substantially corresponding to prescription curve characteristics within a prescribed tolerance, the improvement comprising the steps of determining said finishing curve characteristics of said finishing tool, and producing said initial curvature in said lens blank such that differences between said finishing curve characteristics and said prescription curve characteristics are incorporated into said initial curvature.

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