TORIC LENS WITH DECREASED SENSITIVITY TO CYLINDER POWER AND ROTATION AND METHOD OF USING THE SAME

• US 20110166652A1
• Filed: 07/08/2010
• Published: 07/07/2011
• 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, ZHAO, HUAWEI, WEEBER, HENDRIK A.
• Granted Patent: US 9,216,080 B2
• Time in Patent Office: Days
• US Class Current: 623/6.27
• 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 toric element for correcting astigmatism and having a cylinder power; and

a depth of focus extender coupled to said toric element, said depth of focus extender extending a depth of focus;

wherein the extended depth of focus 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 3, wherein the rotational independence comprises rotational symmetry.

5. The lens of claim 1, wherein said depth of focus extender comprises a low power diffractive element.

6. The lens of claim 5, wherein the low power diffractive element comprises a single diffractive structure.

7. The lens of claim 1, wherein said toric element is positioned on an anterior surface of the intraocular lens.

8. The lens of claim 1, wherein said depth of focus extender is positioned on a posterior surface of the intraocular lens.

9. The lens of claim 1, wherein said toric intraocular element is positioned on a first surface of the intraocular lens, and said depth of focus extender is positioned on an opposing surface of the intraocular lens.

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

11. The lens of claim 10, wherein the first radius of curvature is approximately zero.

12. The lens of claim 10, wherein the second radius of curvature is approximately zero.

13. The lens of claim 1, wherein said toric intraocular 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.

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

15. 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.

16. 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.

17. 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.

18. 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.

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

20. 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.

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

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

23. A vision corrective optic, comprising:

a lens for correcting at least one aberration of an eye;

a depth of focus extender coupled with said lens, said depth of focus extender extending a depth of focus of said lens,

wherein said depth of focus extender increases at least matching to the at least one aberration.

24. The optic of claim 23, wherein said depth of focus extender produces a depth of focus for each meridian at a broader range of foci.

25. The optic of claim 23, wherein said depth of focus extender comprises rotational independence.

26. The optic of claim 25, wherein the rotational independence comprises rotational symmetry.

27. The optic of claim 23, wherein said depth of focus extender comprises a low power diffractive element.

28. The optic of claim 27, wherein the low power diffractive element comprises a single diffractive structure.

29. The optic of claim 23, wherein said depth of focus extender is positioned at a posterior surface of said lens.

30. The optic of claim 23, wherein said depth of focus extender produces a depth of focus greater than about 1 diopter.

31. The optic of claim 23, wherein said depth of focus extender produces a depth of focus in the range of approximately 1 to 3 diopters.

32. The optic of claim 23, wherein said depth of focus extender produces a depth of focus in the range of approximately 2 to 4 diopters.

33. The optic of claim 23, wherein said depth of focus extender decreases maximum achievable image quality by less than approximately a factor of two.

34. The optic of claim 23, wherein the optic is a multifocal corrective optic.

35. A method for decreasing sensitivity of astigmatic correction to errors of cylinder power selection and lens rotational alignment, comprising:

receiving a measure of astigmatism;

receiving a selection of a toric lens to reduce the astigmatism;

receiving a determination of a depth of focus extension for coupling with the selected toric lens;

coupling the determined depth of focus extension and the selected toric lens;

inserting the coupled depth of focus extension and the selected toric lens in a line of sight.

36. The method of claim 35, further comprising receiving historic information about residual astigmatism.

37. The method of claim 35, wherein said inserting comprises implanting.

38. The method of claim 35, wherein said inserting comprises providing a contact lens.

39. The method of claim 35, wherein said inserting comprises surgical corneal modification.

40. The method of claim 35, wherein said inserting comprises a combination of implanting and surgical corneal modification.

41. The method of claim 35, wherein said inserting comprises providing prescription glasses.

42. A vision corrective optic, said optic comprising:

a toric lens for correcting astigmatism and having a base cylinder power; and

a depth of focus extender coupled with said toric lens for extending a depth of focus of said toric lens;

wherein the extended depth of focus comprises a reduced sensitivity to at least a rotation of said toric lens.

43. The optic of claim 42, wherein the extended depth of focus further comprises a reduced sensitivity to the base cylinder power.

44. An intraocular lens for correcting vision, comprising:

a toric element that provides a cylinder power at least by an interaction between a first surface and a second surface of said toric element;

a third surface that provides an extended depth of focus at least by an interaction between said third surface and the second surface of said toric element, wherein the extended depth of focus decreases at least one residual effect of the cylinder power.

45. The lens of claim 44, wherein said first and second surfaces are on a single side of said toric element.

46. The lens of claim 44, wherein said first and third surfaces are on a single side of said toric element.

47. A method of design of an optical element for decreasing the sensitivity of astigmatic correction to errors of cylinder power selection and lens rotational alignment, said method comprising:

measuring astigmatism to be corrected;

selecting a toric lens suitable for correcting said measured astigmatism;

determining an extended depth of focus to provide at least a tolerance of the decrease of the sensitivity based on the selected toric lens and average rotational alignment; and

designing an element having the determined extended depth of focus element for coupling with said toric element.