Method of making a multizonal lens with enhanced performance

Patent metadata

Field	Value
Publication number	US-12564487-B2
Application number	US-202217934521-A
Country	US
Kind code	B2
Filing date	Sep 22, 2022
Priority date	Aug 27, 2007
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A method of making an intraocular lens. The method including forming an anterior surface and an opposing posterior surface, the surfaces being disposed about an optical axis and providing an optic having a clear aperture. The method further including forming a central zone comprising a plurality of optical powers that progressively vary between a first optical power at a center of the central zone and a second optical power at a periphery of the central zone, the absolute value of the difference between the first optical power and the second optical power being between about 0.25 Diopter and about 1 Diopter. The method including forming outer zone disposed about the central zone, the outer zone comprising a third optical power, the outer zone extending from the periphery of the central zone.

First claim

What is claimed is:

1 . A method of making an intraocular lens, comprising:
forming an anterior surface and an opposing posterior surface, the surfaces being disposed about an optical axis and providing an optic with a clear aperture; forming a central zone comprising a plurality of optical powers that progressively vary between a first optical power at a center of the central zone and a second optical power at a periphery of the central zone; and forming an intermediate zone extending from the periphery of the central zone and disposed between the central zone and an outer zone and with a smaller radial extent than either the central zone or outer zone, wherein at least one of the surfaces in the vicinity of the intermediate zone is comprised of a radial profile that smoothly blends the at least one surface of the central zone with the outer zone; forming the outer zone disposed about the central zone, the outer zone comprising a third optical power, the optic having a variation in optical power over the entire clear aperture that is less than about 1 Diopter, wherein the intermediate zone further functions as a transition zone, the radial profile of which is described by a polynomial and/or spline function configured to provide a continuously varying radius of curvature that smoothly blends the central zone with the outer zone, thereby minimizing abrupt optical power shifts and reducing visual artifacts such as halos and glare.

2 . The method of claim 1 , further comprising forming the central zone with an optical power that progressively varies from the first optical power to the second optical power.

3 . The method of claim 1 , further comprising forming the central zone with an optical power that progressively varies from the second optical power to the first optical power.

4 . The method of claim 1 , wherein the variation in optical power over the entire clear aperture is less than or equal to about 0.5 Diopter plus the variation in optical power produced by the spherical aberrations of a spherical optic having a nominal optical power that is equal to the third optical power of the outer zone.

5 . The method of claim 1 , wherein the outer zone further comprises a negative spherical aberration selected to at least partially compensate for a spherical aberration of a cornea of an eye.

6 . The method of claim 5 , wherein the negative spherical aberration is selected based on an average ocular aberration of eyes of a selected population.

7 . The method of claim 6 , wherein the population includes people of a specific age group, people with a cataract, people who have received a corneal ablative procedure, people who are candidates for a corneal ablative procedure, and/or people who are highly myopic or highly hyperopic.

8 . The method of claim 1 , wherein the anterior and posterior surfaces in the vicinity of the central zone comprise spherical surfaces.

9 . The method of claim 1 , wherein the central zone has a diameter that is between about 1 millimeter and about 3 millimeters.

10 . The method of claim 1 , wherein the central zone and the outer zone have at least one surface with a cross-sectional profile described by a polynomial and/or spline.

11 . The method of claim 1 , wherein the zones are configured to provide more light to the retina of an eye for distant vision when light enters the entire central and outer zones.

12 . The method of claim 1 , wherein the first optical power is selected based on the structure of an eye and/or based on a request from a patient.

13 . The method of claim 1 , wherein the outer zone has an optical power that is about 20 Diopters and a spherical aberration that is between about −0.19 and about-0.202 microns.

14 . The method of claim 1 , wherein the outer zone has an optical power that is about 20 Diopters and a spherical aberration that is about-0.156 microns.

15 . The method of claim 1 , wherein at least one of the first optical power and the second optical power is equal to the third optical power.

16 . The method of claim 1 , wherein the third optical power is selected to provide distant vision when the intraocular lens is disposed within an eye, and the first optical power and the second optical power are selected so that the central zone provides a visual acuity of at least 20/30, based on the standard Snellen test for visual acuity, for objects located at a hyperfocal distance from the eye.

17 . The method of claim 1 , wherein at least one of the zones has a cylinder power.

Assignees

• Amo Groningen Bv

Inventors

• Bogaert Theophilus

Classifications

• A61F2/1618

  Multifocal lenses · CPC title

• A61F2/1637

  Correcting aberrations caused by inhomogeneities; correcting intrinsic aberrations, e.g. of the cornea, of the surface of the natural lens, aspheric, cylindrical, toric lenses · CPC title

• G02C2202/02

  Mislocation tolerant lenses or lens systems · CPC title

• G02C7/041

  bifocal; multifocal · CPC title

• G02C7/04

  Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00) · CPC title