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Progressive addition lenses

  • US 6,883,916 B2
  • Filed: 12/03/2003
  • Issued: 04/26/2005
  • Est. Priority Date: 04/10/2001
  • Status: Expired due to Term
First Claim
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1. A method for designing a progressive addition surface of a progressive addition lens comprising the steps of:

  • a.) designing a progressive surface comprising at least one first area of unwanted astigmatism;

    b.) designing a regressive surface comprising at least one second area of unwanted astigmatism; and

    c.) combining the progressive and regressive surface designs to form a composite progressive surface design formed on at least one of the front and back surfaces of the lens, wherein the at least one first and second areas of unwanted astigmatism are substantially aligned.

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