HAPTIC FOR ACCOMMODATING INTRAOCULAR LENS

• US 20080161913A1
• Filed: 12/29/2006
• Published: 07/03/2008
• Est. Priority Date: 12/29/2006
• Status: Active Grant

• Current Assignee: Johnson & Johnson Surgical Vision, Inc. (Johnson & Johnson)
• Original Assignee: Advanced Medical Optics Incorporated (Johnson & Johnson)
• Inventors: Brady, Daniel G., Weeber, Hendrik A., Cali, Douglas S., Nguyen, Tuyet Hoc
• Granted Patent: US 7,713,299 B2
• Time in Patent Office: Days
• US Class Current: 623/6.43
• CPC Class Codes: A61F 2/1635 for changing shape
• CPC Class Codes: A61F 2002/1681 having supporting structure for lens, e.g. haptics
• CPC Class Codes: A61F 2002/169 Surrounding optic
• CPC Class Codes: A61F 2230/0095 Saddle-shaped
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility

Abstract

An intraocular lens is disclosed, with an optic that changes shape in response to a deforming force exerted by the zonules of the eye. A haptic supports the optic around its equator and couples the optic to the capsular bag of the eye. The region of contact between the optic and the haptic extends into the edge of the optic, similar to the interface between a bicycle tire and the rim that holds it in place. The haptic may be stiffer than the optic. The haptic may have the same refractive index as the optic. The haptic may include a saddle-shaped portion in contact with the adjustable optic, with a convex profile along an optical axis; and a concave profile in a plane perpendicular to the optical axis.

Claims

1. An intraocular lens for implantation in a capsular bag of an eye, comprising:

an adjustable optic having an axial thickness through the center thereof; and

a haptic including a portion protruding into the adjustable optic, the haptic portion having a maximum axial thickness that is at least one half the axial thickness of the adjustable optic;

whereby the haptic is configured to transmit forces to alter at least one of the shape and the thickness of the adjustable optic.

2. The intraocular lens of claim 1, wherein the haptic protrudes into the edge of the adjustable optic.

3. The intraocular lens of claim 1, wherein the haptic includes a saddle-shaped portion in contact with the adjustable optic;

4. The intraocular lens of claim 3,

wherein the saddle-shaped portion has a convex profile along an optical axis of the intraocular lens;

and

wherein the saddle-shaped portion has a concave profile in a plane perpendicular to the optical axis of the intraocular lens.

5. The intraocular lens of claim 4, wherein the convex profile is a continuous curve.

6. The intraocular lens of claim 4, wherein the convex profile includes at least one straight portion inclined with respect to the plane perpendicular to the optical axis of the intraocular lens.

7. The intraocular lens of claim 4, wherein the convex profile includes at least one straight portion parallel to the optical axis of the intraocular lens.

8. The intraocular lens of claim 4, wherein the concave profile has a deepest portion.

9. The intraocular lens of claim 8, wherein the deepest portion is located away from a plane located halfway between an anterior surface and a posterior surface of the adjustable optic.

10. The intraocular lens of claim 9, wherein the deepest portion is located closer to an anterior surface than to a posterior surface of the adjustable optic.

11. The intraocular lens of claim 9, wherein the deepest portion is located closer to a posterior surface than to an anterior surface of the adjustable optic.

12. The intraocular lens of claim 4, wherein the concave profile is a continuous curve.

13. The intraocular lens of claim 4, wherein the concave profile is concentric with the optical axis of the intraocular lens.

14. The intraocular lens of claim 1, wherein the haptic is stiffer than the adjustable optic.

15. The intraocular lens of claim 1, wherein the haptic has a stiffness greater than 500 kPa.

16. The intraocular lens of claim 1, wherein the adjustable optic has a stiffness less than 500 kPa.

17. The intraocular lens of claim 16, wherein the adjustable optic has a stiffness between 0.5 kPa and 500 kPa.

18. The intraocular lens of claim 17, wherein the adjustable optic has a stiffness between 25 kPa and 200 kPa.

19. The intraocular lens of claim 18, wherein the adjustable optic has a stiffness between 25 kPa and 50 kPa.

20. The intraocular lens of claim 1, wherein the haptic comprises at least two materials having different stiffnesses.

21. The intraocular lens of claim 1, wherein the haptic has essentially the same refractive index as the adjustable optic.

22. The intraocular lens of claim 1, wherein the haptic includes a plurality of radial segments that are shaped to conform to an equatorial region of the capsular bag.

23. An intraocular lens for implantation in a capsular bag of an eye, comprising:

an adjustable optic having an optic stiffness and an optic refractive index; and

a haptic having a haptic stiffness and a haptic refractive index for coupling the adjustable optic to the capsular bag;

wherein the haptic stiffness is greater than the optic stiffness; and

wherein the haptic refractive index is essentially equal to the optic refractive index.

24. The intraocular lens of claim 23, wherein the haptic stiffness is greater than the optic stiffness by at least a factor of two.

25. The intraocular lens of claim 23, wherein the haptic stiffness is greater than 500 kPa.

26. The intraocular lens of claim 23, wherein the optic stiffness is less than 500 kPa.

27. The intraocular lens of claim 26, wherein the optic stiffness is between 25 kPa and 50 kPa.

28. A method of adjusting the focus of an intraocular lens having an adjustable optic having an annular recess, comprising:

applying a deforming force through a haptic in contact with the annular recess of the adjustable optic; and

altering at least one parameter of the adjustable optic in response to the deforming force.

29. The method of claim 28, wherein the at least one parameter comprises an anterior radius of curvature of the adjustable optic.

30. The method of claim 28, wherein the at least one parameter comprises a posterior radius of curvature of the adjustable optic.

31. The method of claim 28, wherein the at least one parameter comprises a thickness of the adjustable optic.

32. The method of claim 28, further comprising:

applying the deforming force to create an asymmetric deformation of the adjustable optic.