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Ophthalmic lenses with diffractive power

  • US 4,655,565 A
  • Filed: 02/13/1985
  • Issued: 04/07/1987
  • Est. Priority Date: 02/23/1984
  • Status: Expired due to Term
First Claim
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1. An ophthalmic lens having positive diffractive power which introduces negative longitudinal chromatic aberration to an extent that more than counteracts the natural positive longitudinal chromatic aberration of the eye so as to provide in use a residual negative longitudinal chromatic aberration.

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  • 8 Assignments
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