Toric lens with decreased sensitivity to cylinder power and rotation and method of using the same

• US 9,216,080 B2
• Filed: 07/08/2010
• Issued: 12/22/2015
• Est. Priority Date: 08/27/2007
• Status: Active Grant

• Current Assignee: Amo Groningen B.V (Johnson & Johnson)
• Original Assignee: Amo Groningen B.V (Johnson & Johnson)
• Inventors: Bogaert, Theophilus, Weeber, Hendrik A., Zhao, Huawei
• Primary Examiner(s): Willse, David H
• Assistant Examiner(s): SHIPMON, TIFFANY P
• Application Number:
  US12/832,816
• Publication Number:
  US 20110166652A1
• Time in Patent Office: 1,993 Days
• Field of Search: 623/6.27, 623 63- 631
• US Class Current: 1/1
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: A61F 2/1645 Toric lenses
• CPC Class Codes: A61F 2/1654 Diffractive lenses
• CPC Class Codes: A61F 2002/1699 Additional features not otherwise provided for
• CPC Class Codes: A61F 9/013 Instruments for compensation of ocular refraction A61F9/008 takes precedence; Instruments for use in cornea removal, for reshaping or performing incisions in the cornea
• CPC Class Codes: G02B 27/0075 with means for altering, e.g. increasing, the depth of field or depth of focus
• CPC Class Codes: G02B 3/06 with cylindrical or toric faces
• CPC Class Codes: G02C 2202/02 Mislocation tolerant lenses or lens systems
• CPC Class Codes: G02C 2202/06 Special ophthalmologic or optometric aspects
• CPC Class Codes: G02C 2202/20 Diffractive and Fresnel lenses or lens portions
• CPC Class Codes: G02C 7/02 Lenses; Lens systems ; Methods of designing lenses
• CPC Class Codes: G02C 7/027 considering wearer's parameters
• CPC Class Codes: G02C 7/041 bifocal; multifocal
• CPC Class Codes: G02C 7/06 bifocal; multifocal ; progressive G02C7/041 takes precedence

Abstract

A method, system and apparatus for vision correction are disclosed. The method, system and apparatus include a toric intraocular element for correcting astigmatism and having a cylinder power, and a depth of focus extender coupled to the toric intraocular element, the depth of focus extender extending a depth of focus. The extended depth of focus may reduce sensitivity of the toric intraocular element to at least one of rotation and selected cylinder power.

Claims

1. An intraocular lens for correcting vision, comprising:

a first surface;

a second surface opposing the first surface;

a toric element for correcting astigmatism and having a cylinder power, said toric element positioned on the first surface; and

a depth of focus extender consisting of a single ring diffractive structure in the shape of an oval, said depth of focus extender positioned on the second surface;

wherein said depth of focus extender reduces sensitivity of said toric element to at least one selected from the group consisting of rotation and the cylinder power.

2. The lens of claim 1, wherein said depth of focus extender extends the depth of focus for each meridian.

3. The lens of claim 1, wherein said depth of focus extender comprises rotational independence.

4. The lens of claim 1, wherein the first surface is an anterior surface of the intraocular lens.

5. The lens of claim 4, wherein the second surface is a posterior surface of the intraocular lens.

6. The lens of claim 1, wherein said toric element has a first radius of curvature, and a second radius of curvature oriented approximately 90 degrees from the first radius of curvature.

7. The lens of claim 6, wherein the first radius of curvature is approximately zero.

8. The lens of claim 6, wherein the second radius of curvature is approximately zero.

9. The lens of claim 1, wherein said toric element comprises a radius of first curvature substantially aligned with a meridian of minimum optical power, and a second radius of curvature substantially aligned with a meridian of maximum optical power.

10. The lens of claim 1, wherein said depth of focus extender produces a depth of focus larger than about 1 diopter.

11. The lens of claim 1, wherein said depth of focus extender produces a depth of focus in the range of approximately 1 to 3 diopters.

12. The lens of claim 1, wherein said depth of focus extender produces a depth of focus in the range of approximately 1 to 5 diopters.

13. The lens of claim 1, wherein said depth of focus extender produces a depth of focus in the range of approximately 2 to 4 diopters.

14. The lens of claim 1, wherein said depth of focus extender produces a depth of focus in the range of approximately 2 to 6 diopters.

15. The lens of claim 1, wherein the cylinder power is in the range of approximately 0.5 to approximately 10 diopters.

16. The lens of claim 1, wherein said depth of focus extender decreases a maximum achievable image quality by less than approximately a factor of two.

17. The lens of claim 1, further comprising an aspheric element for correcting spherical aberration.

18. The lens of claim 1, further comprising a diffractive element for correcting chromatic aberration.

19. The lens of claim 1, wherein said intraocular lens is a monofocal intraocular lens.