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Aspheric ophthalmic accommodating lens design for intraocular lens and contact lens

  • US 5,173,723 A
  • Filed: 10/02/1990
  • Issued: 12/22/1992
  • Est. Priority Date: 10/02/1990
  • Status: Expired due to Fees
First Claim
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1. A multifocal lens configuration providing correction of the refractive error and accommodative insufficiency of the eye, comprising;

  • a lens body having first and second surfaces, wherein at least one of said surfaces is defined as being a rotationally non-symmetrical aspheric surface, said aspheric surface varying in curvature and refractive power rotationally about the apical umbilical point of the lens surface at which the derivative of curvature vanishes, with the surface contour defined by a continuum of mathematically defined semi-meridian sections tangent to one another at said apical umbilical point and which together form a continuous surface that includes at least four defined angular zones of predetermined curvature, wherein the semi-meridian sections in each of said at least four defined angular zones are varied in a predetermined manner to provide clear vision over ranges of near, intermediate, or distance vision.

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