System, ophthalmic lens, and method for extending depth of focus

• US 9,454,018 B2
• Filed: 06/11/2012
• Issued: 09/27/2016
• Est. Priority Date: 02/15/2008
• Status: Active Grant

• Current Assignee: Amo Groningen B.V (Johnson & Johnson)
• Original Assignee: Amo Groningen B.V (Johnson & Johnson)
• Inventors: Manzanera, Silverstre, Weeber, Hendrik Albert, Piers, Patricia Ann, Artal, Pablo
• Primary Examiner(s): Willse, David H
• Assistant Examiner(s): Blanco, Javier
• Application Number:
  US13/493,796
• Publication Number:
  US 20130060330A1
• Time in Patent Office: 1,569 Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/14 Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
• CPC Class Codes: A61F 2/1613 having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
• CPC Class Codes: A61F 2/1618 Multifocal lenses
• CPC Class Codes: A61F 2/1637 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 Class Codes: A61F 2/1654 Diffractive lenses
• CPC Class Codes: A61F 2/1659 having variable absorption coefficient for electromagnetic radiation, e.g. photochromic lenses
• CPC Class Codes: A61F 2240/002 Designing or making customized prostheses
• CPC Class Codes: G02C 2202/20 Diffractive and Fresnel lenses or lens portions
• CPC Class Codes: G02C 2202/22 Correction of higher order and chromatic aberrations, wave front measurement and calculation
• CPC Class Codes: G02C 7/02 Lenses; Lens systems ; Methods of designing lenses

Abstract

System, ophthalmic lens, and method for extending depth of focus includes an optic having a clear aperture disposed about a central axis. The optic includes a first surface and an opposing second surface. The first and second surfaces are configured to introduce an asymmetric aberration to the eye while maintaining the in-focus visual acuity.

Claims

1. A method for modifying a depth of focus of an eye, the method comprising the steps of:

measuring a wavefront aberration of the eye;

determining an in-focus visual acuity of the eye; and

determining a asymmetric aberration to be induced in the wavefront aberration of the eye, the depth of focus being extended by the asymmetric aberration when induced in the wavefront aberration and while maintaining the in-focus visual acuity;

forming a multifocal ophthalmic lens, having at least two focal points, one to correct near vision and one to correct far vision, and configured to introduce the asymmetric aberration;

wherein the forming step comprises one of a group consisting of;

lathe-cutting an ophthalmic lens having first and second opposing surfaces, the first and second opposing surfaces together configured to introduce the asymmetric aberration to the eye; and

molding an ophthalmic lens having first and second opposing surfaces, the first and second opposing surfaces together configured to introduce the asymmetric aberration to the eye,

wherein the introduced asymmetric aberration extends the depth of focus associated with each of the at least two focal points.

2. The method of claim 1, further comprising inducing the asymmetric aberration in the wavefront aberration.

3. The method of claim 2, wherein the step of inducing is selected from a group consisting of:

implanting an intraocular lens configured to introduce the asymmetric aberration to the eye while maintaining the in-focus visual acuity;

positioning an ophthalmic lens adjacent the eye, the ophthalmic lens configured to introduce the asymmetric aberration to the eye while maintaining the in-focus visual acuity;

photoaltering a cornea of the eye to introduce the asymmetric aberration to the eye while maintaining the in-focus visual acuity;

implanting a corneal tissue portion in the cornea of the eye, the corneal tissue configured to introduce the asymmetric aberration to the eye while maintaining the in-focus visual acuity; and

inserting an intracorneal implant in the cornea of the eye, the intracorneal implant configured to introduce the asymmetric aberration to the eye while maintaining the in-focus visual acuity.

4. The method of claim 1, wherein the step of determining an asymmetric aberration comprises:

selecting an asymmetric aberration type from a group consisting of an asymmetric astigmatism, a higher order astigmatism, a vertical coma, a lateral coma, and a trefoil; and

determining an amount of the asymmetric aberration type to extend the depth of focus while maintaining the in-focus visual acuity.