US 2001/0018612 A1 · Intracorneal lens

Abstract

A diffractive optical ICL made from two different hydrogel materials that are biologically acceptable for long term implantation in the cornea. The first material has a higher refractive index than the cornea and it is bound to the second material which has a refractive index similar to corneal tissue. The interface between the two materials consists of a microstructured diffractive surface. The adequate permeability of metabolites through both of the hydrogels of the diffractive ICL yields a safe implant for the cornea. Alternatively, the lens may be made of a single material and/or have an edge geometry that minimizes corneal irritation and allows the lens to sit within the corneal tissue smoothly and relatively flat.

Claims22

Dependent claims

An intracomeal lens, comprising:

a) a base lens made from a first hydrogel material and having a refractive index greater than the refractive index of corneal tissue;
b) a diffractive surface formed on the base lens;
C) a coating covering the diffractive surface, the coating made from a second hydrogel material having a refractive index that is less than the refractive index of the first material;
and
d) an outer peripheral edge having a relatively flat posterior surface, a bicurved anterior surface and a relatively straight portion connecting the anterior surface to the posterior surface.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/798,200Filed 2 Mar 2001

Priority

7 Aug 1997

Published

30 Aug 2001

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

A61F 2/145
Eye parts, e.g. lenses or corneal implants; Artificial eyes: corneal inlays, onlays, or lenses for refractive correction
A61F 2/1451
Corneal inlays, onlays, or lenses for refractive correction: inlays or onlays
A61F 2/1648
Having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having…:…
A61F 2/1654
Having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having…:…

Intracorneal lens

Life of this patent

Intracorneal lens

Life of this patent

Abstract

Claims22