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Aspherical corneal implant

  • US 7,776,086 B2
  • Filed: 04/30/2004
  • Issued: 08/17/2010
  • Est. Priority Date: 04/30/2004
  • Status: Active Grant
First Claim
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1. A corneal implant, comprising:

  • a lens body formed of an optically clear, bio-compatible material, the lens body having an anterior surface and a posterior surface, and an outer diameter edge;

    the bio-compatible material having a refractive index ranging from 1.36-1.39; and

    the anterior surface being convex in shape and being formed with a continuous aspheric surface,wherein the lens body is adapted to be disposed posterior to a first portion of the cornea and anterior to a second portion of the cornea when implanted,wherein the continuous aspheric surface is defined by the formula;

    X2+Y2+(1+Q)Z2+2ZR=0, wherein the Z axis is the optical axis of the implant, wherein the aspheric surface is a circularly symmetric surface about the Z axis with the apex of the surface at the coordinates X=0, Y=0, Z=0, wherein Z is the coordinate of the surface along the Z axis, wherein X and Y are the coordinates of the surface in the plane perpendicular to the Z axis, wherein R is the radius of curvature at the apex of the implant, and wherein Q is the surface asphericity of the aspheric surface and Q<

    0.

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