INTRAOCULAR LENS HAVING EXTENDED DEPTH OF FOCUS

• US 20090234448A1
• Filed: 05/13/2008
• Published: 09/17/2009
• Est. Priority Date: 08/27/2007
• Status: Active Grant

• Current Assignee: AMO Regional Holdings (Abbott Laboratories Incorporated)
• Original Assignee: Advanced Medical Optics Incorporated (Johnson & Johnson)
• Inventors: Weeber, Hendrik Albert, Piers, Patricia Ann, Reisin, Carina R.
• Granted Patent: US 8,740,978 B2
• Time in Patent Office: Days
• US Class Current: 623/6.300
• CPC Class Codes: A61F 2/15 Implant having one or more holes, e.g. for nutrient transport, for facilitating handling
• 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 2/1654 Diffractive lenses
• 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 7/028 Special mathematical design techniques
• CPC Class Codes: G02C 7/042 Simultaneous type

Abstract

An ophthalmic lens for providing enhanced or extended depth of focus includes an optic having an aperture disposed about an optical axis. The optic includes a first surface having a first shape and an opposing second surface having a second shape, the first and second surfaces providing, a base power and, in some embodiments an add power. The optic further includes an extended focus mask disposed upon at least one of the first shape and the second shape that is configured to provide the enhanced or extended depth of focus for one or more foci of the optic, as compared to a similar optic not having the extended focus mask.

Claims

1. A multifocal intraocular lens, comprising:

an optic having an aperture disposed about an optical axis, the optic comprising;

a first surface having a first shape and an opposing second surface having a second shape, the first and second surfaces providing a base power and an add power, the powers selected to produce a first focus and a second focus when the intraocular lens is placed within an eye of a subject; and

an extended focus mask disposed on at least one of the shapes;

at least one of the first focus and second focus has an extended depth of focus.

2. The multifocal intraocular lens of claim 1, wherein at least one of the first focus and second focus has a depth of focus, when illuminated by a light source over the entire aperture, that is greater than a depth of focus of a reference optic without the extended focus mask, the reference optic having an aperture equal to the aperture of the intraocular lens and at least one of a base power equal to the base power of the intraocular lens and an add power equal to the add power of the intraocular lens.

3. The multifocal intraocular lens of claim 1, wherein the apertures are clear apertures of the optics.

4. The multifocal intraocular lens of claim 1, wherein the apertures are circular and have a diameter of at least 4 mm.

5. The multifocal intraocular lens of claim 1, wherein the add power of the intraocular lens is at least 2 Diopters.

6. The multifocal intraocular lens of claim 1, wherein the base power of the intraocular lens is selected to provide distant vision and the add power of the intraocular lens is selected to provide at least one of near vision and intermediate vision.

7. The multifocal intraocular lens of claim 1, wherein the base power of the intraocular lens is selected to provide vision at a hyperfocal distance and the add power of the intraocular lens is selected to provide at least one of near vision and intermediate vision.

8. The multifocal intraocular lens of claim 1, wherein at least one of the first and second surfaces includes at least one of a spherical aberration and a chromatic aberration, the at least one aberration selected to correct at least one of a spherical aberration and a chromatic aberration of the eye.

9. The multifocal intraocular lens of claim 8, wherein the spherical aberration is a negative spherical aberration that is selected to a at least partially compensate for a positive spherical aberration of a cornea of the eye.

10. The multifocal intraocular lens of claim 1, wherein the reference optic comprises opposing convex spherical surfaces with common base curvatures, the reference optic having a base power that is equal to the base power of the intraocular lens or the sum of the base power of the intraocular lens and the add power of the intraocular lens.

11. The multifocal intraocular lens of claim 1, wherein at least one of the first surface and the second surface comprises a multifocal diffractive profile disposed on the first shape or the second shape.

12. The multifocal intraocular lens of claim 1, wherein at least one of the first surface and the second surface comprises a refractive pattern disposed on the first shape or the second shape, the add power of the intraocular lens resulting, at least in part, from an add power of the refractive pattern.

13. The multifocal intraocular lens of claim 1, wherein the extended focus mask comprises a diffractive pattern disposed on the first shape or the second shape, the diffractive pattern having with an add power that is less than or equal to about 1.5 Diopters.

14. The multifocal intraocular lens of claim 1, wherein the extended focus mask comprises a refractive pattern disposed on the first shape or the second shape, the refractive pattern having an add power that is less than or equal to one Diopter.

15. The multifocal intraocular lens of claim 1, wherein the extended focus mask is a phase-affecting, non-diffractive mask including one or more spatially low frequency phase transitions.

16. The multifocal intraocular lens of claim 15, wherein the extended focus mask defines a predetermined pattern formed by spaced-apart, optically transparent features differently affecting the phase of light passing through the extended focus mask.

17. The multifocal intraocular lens of claim 1, further comprising a diffractive pattern disposed on the first shape or the second shape, the add power of the intraocular lens resulting, at least in part, from a diffracted order of the diffractive pattern.

18. The multifocal intraocular lens of claim 17, wherein the extended focus mask and the diffractive pattern are disposed on a same surface of the intraocular lens.

19. The multifocal intraocular lens of claim 17, wherein the diffractive pattern has a first diffracted order providing a first diffractive power, the base power of the intraocular lens being determined at least in part by the first shape and the second shape, the add power of the intraocular lens being determined at least in part by the first diffractive power.

20. The multifocal intraocular lens of claim 17, wherein the diffractive pattern has a nth diffracted order providing a first diffractive power and a (n+1)th diffracted order providing a second diffractive power, the base power of the intraocular lens being determined at least in part by the first shape, the second shape, and the first diffractive power, the add power of the intraocular lens being determined at least in part by the difference between the second diffractive power and the first diffractive power.

21. The multifocal intraocular lens of claim 1, wherein when the optic is placed in an intraocular lens plane of a physical eye model including a model cornea, the modulation transfer function of the eye model for at least on of the foci of the intraocular lens exceeds about 0.17, at a spatial frequency of about 50 line pairs per millimeter, over a range of at least about 1.7 Diopters.

22. The multifocal intraocular lens of claim 1, wherein at least one of the foci of the intraocular lens has a depth of focus, when illuminated by a light source, that is at least about 30% greater than that of an intraocular reference lens without the extended focus mask, the intraocular reference lens having a refractive power that is equal to the base power of the intraocular lens.

24. The multifocal intraocular lens of claim 1, wherein focus has a depth of focus, when illuminated by a light source over the entire aperture, that is greater than a depth of focus of a reference optic without the extended focus mask, the reference optic having an aperture equal to the aperture of the intraocular lens and a base power equal to the base power of the intraocular lens.

23. An intraocular lens, comprising:

an optic having an aperture disposed about an optical axis, the optic comprising;

a first surface having a first shape and an opposing second surface having a second shape, the first and second surfaces providing a base power selected to produce a focus when the intraocular lens is placed within an eye of a subject; and

an extended focus mask disposed on at least one of the shapes;

the focus having an extended depth of focus.

the intraocular lens configured to change the optical power of the base power in response to an ocular force.

25. The intraocular lens of claim 23, wherein the apertures are clear apertures of the optics.

26. The intraocular lens of claim 23, wherein the apertures are circular and have a diameter of at least 4.5 mm.

27. The intraocular lens of claim 23, wherein at least one of the first and second surfaces includes at least one of a spherical aberration and a chromatic aberration, the at least one aberration selected to correct at least one of a spherical aberration and a chromatic aberration of the eye.

28. The multifocal intraocular lens of claim 27, wherein the spherical aberration is a negative spherical aberration that is selected to a at least partially compensate for a positive spherical aberration of a cornea the eye.

29. The intraocular lens of claim 23, wherein the reference optic comprises opposing convex spherical surfaces with common base curvatures.

30. The intraocular lens of claim 23, wherein at least one of the first surface and the second surface comprises a multifocal diffractive profile disposed on the first shape or the second shape.

31. The intraocular lens of claim 23, wherein at least one of the first surface and the second surface comprises a refractive pattern disposed on the first shape or the second shape, the add power of the intraocular lens resulting, at least in part, from an add power of the refractive pattern.

32. The intraocular lens of claim 23, further comprising a positioning member coupled to the optic and configured for changing the shape of the optic in response to the ocular force

33. The intraocular lens of claim 25, wherein the positioning member comprises opposing anterior and posterior arcuate segments and a plurality of circumferentially spaced legs each having a first end joined to the optic and a second end joined to at least one of the arcuate segments.

34. The intraocular lens of claim 23, wherein the ocular force is less than 20 grams force.

35. The intraocular lens of claim 23, wherein the extended focus mask comprises a diffractive pattern disposed on the first shape or the second shape, the diffractive pattern having with an add power that is less than or equal to about 1.5 Diopters.

36. The intraocular lens of claim 23, wherein the extended focus mask comprises a refractive pattern disposed on the first shape or the second shape, the refractive pattern having an add power that is less than or equal to one Diopter.

37. The intraocular lens of claim 23, wherein the extended focus mask is a phase-affecting, non-diffractive mask including one or more spatially low frequency phase transitions.

38. The intraocular lens of claim 37, wherein the extended focus mask defines a predetermined pattern formed by spaced-apart, optically transparent features differently affecting the phase of light passing through the extended focus mask.

39. The intraocular lens of claim 23, wherein a single flexible optic having anterior and posterior sides;

and at least two portions extending from the optic, the portions having hinged inner ends adjacent the optic and outer ends distal to the optic, the outer ends being movable anteriorly and posteriorly relative to the optic, and the portions having at least one flexible fixation finger at the outer ends of the portions.

40. The intraocular lens of claim 23, the intraocular lens configured to change the optical power of the base power of the intraocular lens by at least 1 Diopter.

41. The intraocular lens of claim 40, wherein the haptic includes a plurality of radial segments that are shaped to conform to an equatorial region of the capsular bag.

42. The intraocular lens of claim 23, wherein the intraocular lens is optically described by a model lens, such that when the model lens is disposed along an intraocular lens plane of an eye model including a model cornea, the modulation transfer function of the eye model for the focus of the intraocular lens exceeds about 0.17, at a spatial frequency of about 50 line pairs per millimeter, over a range of at least 1.7 Diopters.

43. The intraocular lens of claim 42, wherein the modulation transfer function of the eye model exceeds about 0.20, at a spatial frequency of about 50 line pairs per millimeter, over a range of at least about 1.9 Diopters.

44. The intraocular lens of claim 23, wherein when the optic is placed in an intraocular lens plane of a physical eye model including a model cornea, the modulation transfer function of the eye model for the focus of the intraocular lens exceeds about 0.17, at a spatial frequency of about 50 line pairs per millimeter, over a range of at least about 1.7 Diopters.

45. The intraocular lens of claim 23, wherein the focus of the intraocular lens has a depth of focus, when illuminated by a light source, that is at least about 30% greater than that of an intraocular reference lens without the extended focus mask, the intraocular reference lens having a refractive power that is equal to the base power of the intraocular lens.

46. The intraocular lens of claim 23, further comprising a second optic disposed separate from the optic having the extended focus mask.