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Diffractive trifocal intra-ocular lens design

  • US 5,344,447 A
  • Filed: 11/12/1992
  • Issued: 09/06/1994
  • Est. Priority Date: 11/12/1992
  • Status: Expired due to Fees
First Claim
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1. An intraocular optical lens comprising a refractive component on an anterior surface of the lens, and a completely transparent diffractive component on a posterior surface of the lens, and a generally anterior-posterior optical axis, the diffractive component having a zero order, a negative first order, and a positive first order, the refractive component combined with the positive first order of the diffractive component adapted to focus the incident light on the lens for near vision, the refractive component adapted to focus the incident light on the lens for mid-range vision, and the refractive component combined with the negative first order of the diffractive component adapted to focus the incident light on the lens for far vision.

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