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Toric lens with axis mislocation latitude

  • US 5,570,143 A
  • Filed: 03/18/1994
  • Issued: 10/29/1996
  • Est. Priority Date: 08/09/1991
  • Status: Expired due to Term
First Claim
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1. A toric lens for axis mislocation correction comprising a toric lens having optical topography on at least one surface of the lens which induces a depth of field effect on the eye and enables the principle meridians of power on the lens to align with those on the eye of a wearer such that the depth of field effect compensates for mislocation error if the lens mislocates 1 degree or more, said lens being thin enough to allow sufficient oxygen transmission therethrough to provide satisfactory morphology of the eye of a wearer.

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