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Bifocal intra-ocular lens

  • US 4,636,211 A
  • Filed: 03/13/1984
  • Issued: 01/13/1987
  • Est. Priority Date: 03/13/1984
  • Status: Expired due to Term
First Claim
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1. An intra-ocular lens adapted to be implanted in a human eye comprisinga transparent single one-piece lens body, the transparent body having a permanently fixed centrally located, near vision optically powered first portion and a concentrically located, far vision optically powered second portion, the first portion having an average diameter of approximately 2.12 mm and the body having an average diameter of approximately 6 mm, the first portion being optically powered within the range of from +10.00 to +30.00 diopters effective power and the second portion being optically powered within the range of from +10.00 to +30.00 diopters effective power, the difference in effective power between the first and second portions averaging +2.50 diopters effective power in order to ensure distinction in focus and to provide rapid neuro-transfer between near and far vision.

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