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Progressive addition lenses

DC
  • US 6,149,271 A
  • Filed: 10/23/1998
  • Issued: 11/21/2000
  • Est. Priority Date: 10/23/1998
  • Status: Expired due to Term
First Claim
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1. A lens comprising a first progressive addition surface having one or more areas of maximum, localized unwanted astigmatism and a first dioptric add power and second progressive addition surface having one or more areas of maximum, localized unwanted astigmatism and a second dioptric add power, the progressive addition surfaces disposed in relation to each other so that a portion or all of the areas of maximum, localized unwanted astigmatism are misaligned and wherein the dioptric add power of the lens is about the sum of the first and second dioptric add powers.

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