Methods of obtaining ophthalmic lenses providing the eye with reduced aberrations

• US 20060158611A1
• Filed: 03/13/2006
• Published: 07/20/2006
• Est. Priority Date: 12/22/2000
• Status: Abandoned Application

• Current Assignee: Patricia Ann Piers, Sverker Norrby
• Original Assignee: Patricia Ann Piers, Sverker Norrby
• Inventors: Norrby, Sverker, Piers, Patricia Ann
• Application Number:
  US11/375,410
• Publication Number:
  US 20060158611A1
• Time in Patent Office: Days
• US Class Current: 351/177
• CPC Class Codes: A61B 3/1015 for wavefront analysis
• CPC Class Codes: A61B 3/107 for determining the shape or measuring the curvature of the cornea
• CPC Class Codes: A61F 2/1602 Corrective lenses for use in addition to the natural lenses of the eyes or for pseudo-phakic eyes
• 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 2240/002 Designing or making customized prostheses
• CPC Class Codes: G02C 2202/22 Correction of higher order and chromatic aberrations, wave front measurement and calculation

Abstract

An intraocular lens comprises optical part configured to be implanted in an eye of a subject. The intraocular lens further comprises at least one aspheric surface configured, in combination with a lens in the capsular bag of an eye, to reduce an aberration of a wavefront passing the eye. The aberrations may include astigmatism, coma, and/or spherical aberrations. An aberration of the intraocular lens may be expressed as a linear combination of Zernike polynomial terms that may include a Zernike coefficient a₁₁. The Zernike coefficient a₁₁ may be selected to reduce a spherical aberration of a wavefront passing the eye and/or to compensate for an average value resulting from a predetermined number of estimations of the Zernike coefficient a₁₁ in a population of corneas and capsular bag lenses.

Claims

1. An intraocular lens, comprising:

an optical part configured to be implanted in an eye of a subject; and

at least one aspheric surface configured, in combination with a lens in the capsular bag of an eye, to reduce an aberration of a wavefront passing the eye.

2. The intraocular lens of claim 1, wherein the aberration includes at least on of astigmatism, coma, and spherical aberration.

3. The intraocular lens of claim 1, wherein the at least one aspheric surface is configured to reduce a predetermined aberration coefficient below a predetermined borderline value.

4. The intraocular lens of claim 1, wherein an aberration of the intraocular lens is expressed as a linear combination of Zernike polynomial terms.

5. The intraocular lens of claim 4, wherein the linear combination of Zernike polynomial terms includes a Zernike coefficient a₁₁

6. The intraocular lens of claim 5, wherein the Zernike coefficient a₁₁ is selected to reduce a spherical aberration of a wavefront passing the eye.

7. The intraocular lens of claim 5, wherein the Zernike coefficient a₁₁ is selected so as to compensate for an average value resulting from a predetermined number of estimations of the Zernike coefficient a₁₁ in a population of corneas and capsular bag lenses.

8. The intraocular lens of claim 5, wherein the Zernike coefficient a₁₁ is selected so as to compensate for the individual corneal and capsular bag lens coefficient of the subject.

9. The intraocular lens of claim 1, wherein the at least one aspheric surface is configured to reduce at least one Zernike coefficient of a selected population.

10. The intraocular lens of claim 1, wherein the intraocular lens is characterized by one or more parameters which contribute to a determination of a lens shape of the optical part.

11. The intraocular lens of claim 11, wherein at least one of the one or more parameters is selected to deviate sufficiently from a spherical lens so as to compensate for the aberration.

12. An intraocular lens, comprising:

an optical part configured to be implanted between the cornea and the capsular bag; and

at least one aspheric surface configured to compensate for an aberration of a wavefront passing the eye.

13. The intraocular lens of claim 12, wherein the optical part configured to be implanted in the anterior chamber of the eye.

14. The intraocular lens of claim 12, wherein the optical part configured to be implanted in the posterior chamber of the eye.

15. An intraocular lens, comprising:

a correction lens configured to be implanted in an eye of a subject, the eye comprising a cornea and a capsular bag lens which together are characterized by at least one wavefront Zernike coefficient;

the correction lens configured, in combination with cornea and the capsular bag lens, to provide a predetermined reduction in the at least one wavefront Zernike coefficient.

16. The intraocular lens of claim 15, wherein the at least one wavefront Zernike coefficient is at least one of a spherical aberration term and an astigmatism term.

17. The intraocular lens of claim 15, wherein the at least one wavefront Zernike coefficient is an 11th wavefront Zernike coefficient.

18. An intraocular lens, comprising:

an optical part configured to be implanted in an eye of a subject; and

at least one aspheric surface configured, together with a lens in the capsular bag of the eye, to restore a wavefront passing the eye and deviating from sphericity into a more spherical wavefront.