MULTI-RING LENS, SYSTEMS AND METHODS FOR EXTENDED DEPTH OF FOCUS

• US 20140168602A1
• Filed: 08/30/2013
• Published: 06/19/2014
• Est. Priority Date: 08/31/2012
• Status: Active Grant

• Current Assignee: Amo Groningen B.V (Johnson & Johnson)
• Original Assignee: Amo Groningen B.V (Johnson & Johnson)
• Inventors: Weeber, Hendrik A.
• Granted Patent: US 9,335,563 B2
• Time in Patent Office: Days
• US Class Current: 351/159.44
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: A61F 2/1451 Inlays or onlays
• 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 2/1613 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 2/164 Aspheric lenses
• CPC Class Codes: A61F 2/1654 Diffractive lenses
• CPC Class Codes: A61F 2240/002 Designing or making customized prostheses
• CPC Class Codes: G02B 27/0075 with means for altering, e.g. increasing, the depth of field or depth of focus
• 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 7/022 Ophthalmic lenses having special refractive features achieved by special materials or material structures G02C7/049 takes precedence
• CPC Class Codes: G02C 7/024 Methods of designing ophthalmic lenses
• CPC Class Codes: G02C 7/027 considering wearer's parameters
• CPC Class Codes: G02C 7/041 bifocal; multifocal
• CPC Class Codes: G02C 7/044 Annular configuration, e.g. pupil tuned
• CPC Class Codes: G02C 7/06 bifocal; multifocal ; progressive G02C7/041 takes precedence

Abstract

Systems and methods for providing enhanced image quality across a wide and extended range of foci encompass vision treatment techniques and ophthalmic lenses such as contact lenses and intraocular lenses (IOLs). Exemplary IOL optics can include an aspheric refractive profile imposed on a first or second lens surface, and a diffractive profile imposed on a first or second lens surface. The aspheric refractive profile can focus light toward a far focus. The diffractive profile can include a central zone that distributes a first percentage of light toward a far focus and a second percentage of light toward an intermediate focus. The diffractive profile can also include a peripheral zone, surrounding the central zone, which distributes a third percentage of light toward the far focus and a fourth percentage of light toward the intermediate focus.

Claims

1. An ophthalmic lens, comprising:

a first surface and a second surface, the first and second surfaces disposed about an optical axis;

an aspheric refractive profile imposed on the first or second surface; and

a diffractive profile imposed on the first or second surface,

wherein the aspheric refractive profile focuses light toward a far focus, and

wherein the diffractive profile comprises a central zone that distributes a first percentage of light toward a far focus and a second percentage of light toward an intermediate focus, and a peripheral zone, surrounding the central zone, that distributes a third percentage of light toward the far focus and a fourth percentage of light toward the intermediate focus.

2. The ophthalmic lens according to claim 1, wherein the intermediate focus corresponds to an intraocular add power within a range between 1 Diopter and 2.5 Diopters.

3. The ophthalmic lens according to claim 1, wherein the intermediate focus corresponds to an add power between 0.75 and 2 Diopters in the spectacle plane.

4. The ophthalmic lens according to claim 1, wherein the intermediate focus corresponds to an intraocular add power of 1.75 Diopters.

5. The ophthalmic lens according to claim 1, wherein the far focus corresponds to a first diffractive order of the diffractive profile.

6. The ophthalmic lens according to claim 1, wherein the far focus corresponds to a second diffractive order of the diffractive profile.

7. The ophthalmic lens according to claim 1, wherein the far focus corresponds to a third diffractive order of the diffractive profile.

8. The ophthalmic lens according to claim 1, wherein a difference between the intermediate focus and the far field focus corresponds to a power value within a range from about 1 Diopter to about 2.5 Diopters.

9. The ophthalmic lens according to claim 1, wherein a difference between the intermediate focus and the far field focus corresponds to a power of about 1.75 Diopters.

10. The ophthalmic lens according to claim 1, wherein the central zone has an outer diameter within a range from about 1 mm to about 3 mm.

11. The ophthalmic lens according to claim 1, wherein the central zone has an outer diameter of about 2.2 mm.

12. The ophthalmic lens according to claim 1, wherein the percentage of light distributed by the central zone toward the far focus is within a range between 41% and 63%, and the percentage of light distributed by the central zone toward the intermediate focus is within a range between 21% and 41%.

13. The ophthalmic lens according to claim 1, wherein the percentage of light distributed by the central zone toward the far focus is 41% and the percentage of light distributed by the central zone toward the intermediate focus 41%.

14. The ophthalmic lens according to claim 1, wherein the percentage of light distributed by the peripheral zone toward the far focus is within a range between 41% and 100% and the percentage of light distributed by the peripheral zone toward the intermediate focus is within a range from 0% to 41%.

15. The ophthalmic lens according to claim 1, wherein the percentage of light distributed by the peripheral zone toward the far focus is 63% and the percentage of light distributed by the peripheral zone toward the intermediate focus is 21%.

16. The ophthalmic lens according to claim 1, wherein the central zone comprises one or more echelettes each having a step height, and wherein the peripheral zone comprises a plurality of echelettes each having a step height that is less than the step height of each central zone echelette.

17. The ophthalmic lens according to claim 16, wherein the central zone comprises two or more echelettes.

18. The ophthalmic lens according to claim 16, wherein the central zone comprises three or more echelettes.

19. The ophthalmic lens according to claim 16, wherein the central zone comprises two, three, or four echelettes.

20. The ophthalmic lens according to claim 1, wherein the central zone comprises at least one echelette having a step height of about 0.006 millimeters, and wherein the peripheral zone comprises at least one echelette having a step height of about 0.0055 millimeters.

21. The ophthalmic lens according to claim 1, wherein the central zone comprises at least one echelette having an optical path difference of 1.5 wavelengths, and wherein the peripheral zone comprises at least one echelette having an optical path difference of 1.366 wavelengths.

22. The ophthalmic lens according to claim 1, wherein the central zone comprises two echelettes each having a step height, and the peripheral zone comprises seven echelettes each having a step height less than the step heights of the central zone echelettes.

23. The ophthalmic lens according to claim 1, wherein the central zone comprises an inner echelette having an outer diameter of 1.6 mm and an outer echelette having an outer diameter of 2.2 mm, wherein the inner and outer echelettes of the central zone each have a step height, and wherein the peripheral zone comprises seven echelettes each having a step height less than the step heights of the central zone echelettes.

24. The ophthalmic lens according to claim 1, wherein the lens provides an MTF at 50 c/mm of 24 at the intermediate focus and an MTF at 50 c/mm of 44 at the far focus.

25. An ophthalmic lens, comprising:

means for compensating for ocular spherical aberration;

means for compensating for ocular chromatic aberration; and

means for providing an extended depth of focus.

26. The ophthalmic lens according to claim 25, wherein the means for providing an extended depth of focus comprises a lens surface having a diffractive profile.

27. The ophthalmic lens according to claim 25, wherein the means for providing an extended depth of focus comprises a lens surface having a refractive profile.

28. The ophthalmic lens according to claim 25, wherein the means for providing an extended depth of focus comprises a lens surface having a diffractive and a refractive profile.

29. The ophthalmic lens according to claim 25, wherein the means for providing an extended depth of focus comprises a lens surface having a profile that is not diffractive nor refractive.

30. An ophthalmic lens, comprising:

means for compensating for ocular spherical aberration; and

means for compensating for ocular chromatic aberration;

wherein the means for compensating for ocular chromatic aberration and the means for compensating for ocular spherical aberration when combined provide a far focus corresponding to a base power and an intermediate focus corresponding to an add power, and wherein a difference between the base power and the add power defines an extended depth of focus for the lens.

31. The ophthalmic lens according to claim 30, wherein the base power is within a range from 5 to 34 Diopters and the add power is within a range from 1 to 2.5 Diopters.

32. The ophthalmic lens according to claim 30, wherein the means for compensating for ocular spherical aberration comprises a lens surface having an aspherical profile.

33. The ophthalmic lens according to claim 30, wherein the means for compensating for ocular chromatic aberration comprises a lens surface having a diffractive profile.

34. The ophthalmic lens according to claim 30, wherein the means for compensating for ocular chromatic aberration comprises a lens material construction, the construction comprising a first material providing a first optical dispersion and a second material providing a second optical dispersion different from the first optical dispersion.

35. An ophthalmic lens, comprising:

means for compensating for corneal spherical aberration;

means for compensating for ocular chromatic aberration; and

means for providing an extended depth of focus.

36. The ophthalmic lens according to claim 35, wherein the means for providing an extended depth of focus comprises a lens surface having a diffractive profile.

37. The ophthalmic lens according to claim 35, wherein the means for providing an extended depth of focus comprises a lens surface having a refractive profile.

38. The ophthalmic lens according to claim 35, wherein the means for providing an extended depth of focus comprises a lens surface having a diffractive and a refractive profile.

39. The ophthalmic lens according to claim 35, wherein the means for providing an extended depth of focus comprises a lens surface having a profile that is not diffractive nor refractive.

40. An ophthalmic lens, comprising:

means for compensating for corneal spherical aberration; and

means for compensating for ocular chromatic aberration;

wherein the means for compensating for ocular chromatic aberration and the means for compensating for ocular spherical aberration when combined provide a modulation transfer function value at 50 cycles per millimeter of at least 10, for an intermediate focus, at 3 mm and 5 mm pupil diameters.

41. The ophthalmic lens according to claim 40, wherein the means for compensating for corneal spherical aberration comprises a lens surface having an aspherical profile.

42. The ophthalmic lens according to claim 40, wherein the means for compensating for ocular chromatic aberration comprises a lens surface having a diffractive profile.

43. The ophthalmic lens according to claim 40, wherein the diffractive profile comprises a central zone that distributes a first percentage of light toward a far focus and a second percentage of light toward the intermediate focus, and a peripheral zone, surrounding the central zone, that distributes a third percentage of light toward the far focus and a fourth percentage of light toward the intermediate focus.

44. The ophthalmic lens according to claim 40, wherein the means for compensating for ocular chromatic aberration comprises a lens material construction, the construction comprising a first material providing a first optical dispersion and a second material providing a second optical dispersion different from the first optical dispersion.

45. A method for generating an ophthalmic lens prescription for a patient, the method comprising:

inputting a patient parameter data profile specific for the patient, the patient parameter data profile comprising a patient spherical aberration parameter corresponding to a measured spherical aberration of the patient and a patient chromatic aberration parameter corresponding to a measured chromatic aberration of the patient; and

generating the ophthalmic lens prescription for the patient,

wherein the ophthalmic lens prescription is configured to compensate for the measured patient spherical aberration and the measured patient chromatic aberration and to provide a far focus corresponding to a base power and an intermediate focus corresponding to an add power, and wherein a difference between the base power and the add power defines an extended depth of focus for the ophthalmic lens.

46. The method according to claim 45, wherein the ophthalmic lens prescription comprises a member selected from the group consisting of a contact lens prescription, a phakic intraocular lens prescription, a pseudophakic intraocular lens prescription, and a corneal inlay prescription.

47. The method according to claim 45, wherein the patient spherical aberration parameter comprises an ocular spherical aberration parameter.

48. The method according to claim 45, wherein the patient spherical aberration parameter comprises a corneal spherical aberration parameter.

49. The method according to claim 45, wherein the patient chromatic aberration parameter comprises an ocular chromatic aberration parameter.

50. The method according to claim 45, wherein the patient chromatic aberration parameter comprises a corneal chromatic aberration parameter.

51. A method for fabricating an ophthalmic lens prescription for a patient, the method comprising:

inputting an ophthalmic lens prescription for a patient; and

fabricating the ophthalmic lens based on the prescription,

wherein the ophthalmic lens is configured to compensate for a patient spherical aberration and a patient chromatic aberration, wherein the lens is configured to provide a far focus corresponding to a base power and an intermediate focus corresponding to an add power, and wherein a difference between the base power and the add power defines an extended depth of focus for the ophthalmic lens.

52. The method according to claim 51, wherein the ophthalmic lens comprises a member selected from the group consisting of a contact lens, a phakic intraocular lens, a pseudophakic intraocular lens, and a corneal inlay.

53. A system for generating an ophthalmic lens prescription for an eye of a patient, the system comprising:

an input that accepts a patient parameter data profile specific for the patient eye, the patient parameter data profile comprising a patient spherical aberration parameter corresponding to a measured spherical aberration of the patient eye and a patient chromatic aberration parameter corresponding to a measured chromatic aberration of the patient eye; and

a module comprising a tangible medium embodying machine-readable code that generates the ophthalmic lens prescription for the eye,

wherein the ophthalmic lens prescription is configured to compensate for the measured spherical and chromatic aberrations and to provide a far focus corresponding to a base power and an intermediate focus corresponding to an add power, and wherein a difference between the base power and the add power defines an extended depth of focus for the ophthalmic lens.

54. A system for fabricating an ophthalmic lens for an eye of a patient, the system comprising:

an input that accepts an ophthalmic lens prescription for the patient eye, wherein the ophthalmic lens prescription is configured to compensate for a measured patient spherical aberration and a measured patient chromatic aberration of the patient eye, and to provide a far focus corresponding to a base power and an intermediate focus corresponding to an add power, wherein a difference between the base power and the add power defines an extended depth of focus for the ophthalmic lens prescription; and

a manufacturing assembly that fabricates the ophthalmic lens based on the lens prescription.