Accommodating intraocular lens having T-shaped haptics

• US 6,387,126 B1
• Filed: 05/20/1997
• Issued: 05/14/2002
• Est. Priority Date: 02/15/1995
• Status: Expired due to Fees

• Current Assignee: The NICE Trust A Trust of The Isle of Man
• Original Assignee: Medevec Licensing BV
• Inventors: Cumming, J. Stuart
• Primary Examiner(s): Willse, David H.
• Application Number:
  US08/858,978
• Time in Patent Office: 1,820 Days
• Field of Search: 623/6, 623/FOR.105
• US Class Current: 623/6.37
• CPC Class Codes: A61F 2/16 Intraocular lenses
• 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 2/1629 for changing longitudinal position, i.e. along the visual axis when implanted
• CPC Class Codes: A61F 2002/1681 having supporting structure for lens, e.g. haptics
• CPC Class Codes: A61F 2002/16901 Supporting structure conforms to shape of capsular bag
• CPC Class Codes: A61F 2220/0091 connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type

Abstract

An accommodating intraocular lens having anteriorly and posteriorly movable extended portions, such as T-shaped haptics, extending from a central optic to be implanted within a natural capsular beg of a human eye with the extended portions positioned between an anterior capsular rim and a posterior capsule of the bag, whereby during a post-operative healing period, fibrosis occurs about the extended portions to fixate the lens in the bag in a manner such that subsequent natural contraction and relaxation of the ciliary muscle moves the optic to provide vision accommodation of increased accommodation amplitude and diopters of accommodation.

Claims

1. An accommodating intraocular lens for implantation into a generally circular inner surface of an eye, comprising:

(a) an optic;

(b) at least two haptics spaced apart from each other and extending generally radially away from the optic, adapted to engage the generally circular inner surface of the eye for holding the lens in the eye;

(c) each of the haptics including an outer portion with a surface adapted to engage the generally circular inner surface of the eye, at least part of said outer surface extending beyond the diameter of the generally circular inner surface of the eye, when said outer portions is in its unstressed state, said outer portion being flexible and not conforming to the generally circular inner surface of the eye until subjected to compressive forces, so that the outer surface will conform generally to the shape of the inner surface of the eye when subjected to said compression forces upon implantation; and

(d) the haptics being flexible along at least a portion of their respective lengths to move the optic anteriorly and/or posteriorly in response to forces imparted to the lens through contraction and expansion of the generally circular inner surface of the eye.

2. The lens of claim 1, wherein the optic is circular.

3. The lens of claim 1, wherein the haptics are connected to and extend from an outer edge of the optic.

4. The lens of claim 1, wherein the lens is formed of a single piece of material.

5. The lens of claim 1, wherein two haptics extend from opposite sides of the optic.

6. The lens of claim 1, wherein three haptics are spaced apart an equal distance from each other around the optic.

7. The lens of claim 1, wherein the haptics include opposed longitudinal edges that taper inwardly as they extend from the optic.

8. The lens of claim 1, wherein the haptics include upper and lower surface that taper inwardly as they extend from the optic.

9. The lens of claim 1, wherein the haptics include a lower surface extending rearwardly beyond a horizontal plane of a posterior surface of the optic.

10. The lens of claim 1, wherein at least a portion of a haptic upper surface extends forwardly beyond a horizontal plane of a anterior surface of the optic.

11. The lens of claim 1, wherein the haptics and optic are positioned in a normally uniplanar alignment when unstressed.

12. The lens of claim 1, wherein each haptic includes an outer end and said outer portion includes a pair of fingers extending from the outer end.

13. The lens of claim 12, wherein the fingers are relatively straight in their unstressed state.

14. The lens of claim 12, wherein the fingers are curved inwardly in their unstressed state.

15. The lens of claim 12, wherein the fingers are formed integrally with each haptic.

16. The lens of claim 12, wherein the fingers are attached to the outer end of each haptic.

17. The lens of claim 12, wherein the fingers extend from opposite sides of each haptic.

18. The lens of claim 12, wherein the fingers include an enlarged portion adapted to be encapsulated by the inner surface of the eye so as to hold the haptics in place relative to the inner surface of the eye when the inner surface of the eye expands and contracts.

19. The lens of claim 18, wherein the enlarged portion is a knob.

20. The lens of claim 1, wherein each haptic includes at least one hinge adapted to allow the optic to move posteriorly when the inner surface of the eye expands and to move anteriorly when the inner surface contracts.

21. The lens of claim 20, wherein the hinge has an elastic memory operable to bias the hinge back to its normally unstressed position following contraction or expansion of the inner surface of the eye.

22. The lens of claim 21, wherein the hinge is a groove extending across at least one side of the haptic.

23. An accommodating intraocular lens for implantation into a generally circular inner surface of an eye, comprising:

(a) an optic;

(b) at least two haptics spaced apart from each other and extending generally radially away from the optic, adapted to engage the generally circular inner surface of the eye for holding the lens in the eye;

(c) each of the haptics including an other portion with a surface shaped to engage the generally circular inner surface of the eye, at least part of said outer surface extending beyond the diameter of the generally circular inner surface of the eye, when said outer portion is in its unstressed state, said outer portion being flexible and not conforming to the generally circular inner surface of the eye until subjected to compressive forces, so that the outer surface will conform generally to the shape of the inner surface of the eye when subjected to said compression forces upon implantation; and

(d) each of the haptics include including at least one hinge adapted to move the optic anteriorly and/or posteriorly in response to forces imparted to the lens through contraction and expansion of the generally circular inner surface of the eye.

24. The lens of claim 23, wherein the hinge has an elastic memory operable to bias the hinge back to its normally unstressed position following contraction or expansion of the inner surface of the eye.

25. The lens of claim 23, wherein the hinge is a groove extending across at least one side of the haptic.

26. The lens of claim 23, wherein at least a portion of each haptic is rigid.

27. The lens of claim 23, wherein the optic is circular.

28. The lens of claim 23, wherein the haptics are connected to and extend from an outer edge of the optic.

29. The lens of claim 23, wherein the lens is formed of a single piece of material.

30. The lens of claim 23, wherein two haptics extend from opposite sides of the optic.

31. The lens of claim 23, wherein three haptics are spaced apart an equal distance from each other around the optic.

32. The lens of claim 23, wherein the haptics include opposed longitudinal edges that taper inwardly as they extend from the optic.

33. The lens of claim 23, wherein the haptics include upper and lower surface that taper inwardly as they extend from the optic.

34. The lens of claim 23, wherein the haptics include a lower surface that is convexly curved.

35. The lens of claim 34, wherein the haptics lower surface extends rearwardly beyond a posterior surface of the optic.

36. The lens of claim 23, wherein each haptic includes an outer end and said outer portion includes a pair of fingers that extend from the outer end.

37. The lens of claim 36, wherein the fingers are relatively straight in their unstressed state.

38. The lens of claim 36, wherein the fingers are curved inwardly in their unstressed state.

39. The lens of claim 36, wherein the fingers are formed integrally with each haptic.

40. The lens of claim 36, wherein the fingers are attached to the outer end of each haptic.

41. The lens of claim 36, wherein the fingers extend from the outer end of each haptic.

42. The lens of claim 36, wherein the fingers extend from opposite sides of each haptic.

43. The lens of claim 36, wherein the fingers include an enlarged portion adapted to be encapsulated by the inner surface of the eye so as to hold the haptics in place relative to the inner surface of the eye when the inner surface of the eye expands and contracts.

44. The lens of claim 43, wherein the enlarged portion is a knob.

45. An accommodating intraocular lens for implantation into a generally circular inner surface of an eye, comprising:

(a) an optic;

(b) at least two haptics spaced apart from each other and extending generally radially away from the optic, adapted to engage the generally circular inner surface of the eye for holding the lens in the eye;

(c) each of the haptics including an outer portion with a surface adapted to engage the generally circular inner surface of the eye, at least part of said outer surface extending beyond the diameter of the generally circular inner surface of the eye, when said outer portion is in its unstressed state, said outer portion being flexible and not conforming to the generally circular inner surface of the eye until subjected to compressive forces, so that the outer surface will conform generally to the shape of the inner surface of the eye when subjected to said compression forces upon implantation, said outer portion shaped to be encapsulated by the inner surface of the eye so as to hold the haptics in place relative to the inner surface of the eye when the inner surface of the eye expands and contracts; and

(d) the haptics being flexible along at least a portion of their respective lengths to move the optic anteriorly and/or posteriorly in response to forces imparted to the lens through contraction and expansion of the generally circular inner surface of the eye.

46. The lens of claim 45, wherein said outer portion is T-shaped, the T-shaped outer portion having two free ends.

47. The lens of claim 46, wherein the free ends include enlarged portions.

48. The lens of claim 46, wherein at least one of the free ends is knob shaped.

49. The lens of claim 46, wherein at least one of the free ends of disc shaped.

50. The lens of claim 45, wherein each haptic includes at least one hinge adapted to allow the optic to move posteriorly when the inner surface of the eye expands and to move anteriorly when the inner surface contracts.

51. The lens of claim 50, wherein said at least one of the hinges is a reduced portion of the haptic.

52. The lens of claim 50, wherein the hinge has an elastic memory operable to bias the hinge back to its normally unstressed position following contractions or expansion of the inner surface of the eye.