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

• Current Assignee: University Optical Products Company
• Original Assignee: University Optical Products Company
• Inventors: Nielsen, J. McHenry, Miller, Wayne G.
• Primary Examiner(s): Frinks, Ronald L.
• Application Number:
  US06/588,926
• Time in Patent Office: 1,036 Days
• Field of Search: 3/13, 623/6, 351/161, 351/168
• US Class Current: 623/6.28
• CPC Class Codes: A61F 2/1618 Multifocal lenses
• CPC Class Codes: G02C 7/041 bifocal; multifocal

Abstract

An intra-ocular lens consisting of a transparent body has concentrically oriented near vision and far vision, optically powered portions with the near vision portion being centrally positioned relative to the body and the far vision portion being coaxial with and surrounding the near vision portion, the lens being fixed in a position such that the near vision portion is aligned with the pupillary aperture of the eye and is fixed in alignment.

Claims

1. An intra-ocular lens adapted to be implanted in a human eye comprising

a 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.