Intraocular accommodating lens and methods of use
Described herein are intraocular lenses and methods of implantation. In one aspect, the lens includes a shape changing optical element; a force translation element having a first end region coupled to the optical element and a second end region extending towards a ciliary structure, and an attachment portion coupled to the second end region of the force translation element and configured to contact the ciliary structure. The force translation element is configured to functionally transmit movements of the ciliary structure into a force exerted upon the optical element to effect an accommodating and a disaccommodating change of the optical element.
1. A method of inserting an accommodating intraocular lens into an eye of a patient during a cataract procedure, the method comprising:
removing from said eye an anterior portion of a capsular bag of said eye;
removing from said eye a diseased, natural lens from said capsular bag;
inserting into said capsular bag a first portion of the intraocular lens while leaving a second portion of the intraocular lens inside the eye but outside the capsular bag,
wherein said first portion of the intraocular lens comprises an optical element and wherein said second portion of said intraocular lens comprises a tissue-contacting portion of at least one force translation element, the at least one force translation element operatively coupled to the intraocular lens and capable of changing an optical power of the intraocular lens by applying a radially inward compressive force to a first region of the accommodating intraocular lens to expand a second region of the accommodating intraocular lens; and
engaging the tissue-contacting portion of the at least one force translation element with a portion of the ciliary tissue, wherein the tissue-contacting portion of the force translation element abuts but does not penetrate the ciliary tissue upon contact with the ciliary tissue and wherein the tissue-contacting portion comprises a three-dimensional element that fills a space adjacent the ciliary tissue.
2. The method of claim 1 , wherein the intraocular lens further comprises at least one haptic that extends away from the intraocular lens at a first angle, wherein the at least one force translation element extends away from the intraocular lens at a second angle, and wherein the first and second angles are different.
3. The method of claim 1 , wherein the second region of the accommodating intraocular lens comprises at least a portion of one of an anterior surface or a posterior surface of the intraocular lens.
4. The method of claim 3 , wherein the second region of the accommodating intraocular lens consists of the portion of the anterior surface.
5. The method of claim 4 , wherein the portion of the anterior surface consists of a central portion of the anterior surface.
6. The method of claim 3 , wherein the second region of the accommodating intraocular lens consists of the portion of the posterior surface.
7. The method of claim 6 , wherein the portion of the posterior surface consists of a central portion of the posterior surface.
8. The method of claim 1 , wherein, after the inserting the intraocular lens into the eye, movement of the ciliary tissue causes the at least one force translation element to apply the compressive force to the first region of the accommodating intraocular lens to expand the second region of the accommodating intraocular lens, in order to change the optical power.
9. The method of claim 8 , wherein the change in the optical power further comprises a change in spatial configuration along an optical axis of the intraocular lens in an anterior direction.
10. The method of claim 8 , wherein the change in the optical power further comprises a change in spatial configuration along an optical axis of the intraocular lens in a posterior direction.
11. The method of claim 8 , wherein the change in optical power comprises a shape change effected over an entirety of an anterior surface of the intraocular lens.
12. The method of claim 8 , wherein the change in optical power comprises a shape change effected over only a central portion of an anterior surface of the intraocular lens.
13. The method of claim 8 , wherein the change in optical power comprises a shape change effected over an entirety of a posterior surface of the intraocular lens.
14. The method of claim 8 , wherein the change in optical power comprises a shape change effected over only a central portion of a posterior surface of the intraocular lens.
15. The method of claim 12 , wherein the central portion preferentially bulges upon the shape change to cause a change in dioptric effect.
16. The method of claim 14 , wherein the central portion preferentially bulges upon the shape change to cause a change in dioptric effect.
17. The method of claim 1 , wherein a change in optical power is due to a difference in modulus of the second region of the accommodating intraocular lens compared to a modulus of an adjacent portion of the second region of the accommodating intraocular lens.
18. The method of claim 17 , wherein a central region of the intraocular lens comprises a lower modulus material than an outer region of the intraocular lens.
19. The method of claim 1 , wherein the ciliary tissue comprises at least one of a ciliary muscle, a ciliary body, a ciliary process and a zonule.
20. The method of claim 1 , wherein contraction of the ciliary tissue causes the force translation element to apply the compressive force to the first region of the accommodating intraocular lens.
21. The method of claim 1 , wherein at least a portion of the intraocular lens comprises an agent having a biological activity.
22. The method of claim 21 , wherein the agent comprises at least one of an anti-coagulant, a steroidal anti-inflammatory, a non-steroidal anti-inflammatory, and an anti-metabolite.
23. The method of claim 1 , wherein the tissue-contacting portion of the force translation element comprises at least one of a material to elicit a healing response in the ciliary tissue to induce soft tissue integration, a glue, and a hydrogel.
24. The method of claim 1 , wherein the first region of the accommodating intraocular lens comprises a portion of an equatorial region of the intraocular lens.
25. The method of claim 1 , wherein the at least one force translation elements comprises two force translation elements, each of which has a tissue-contacting portion that is placed in contact with the ciliary tissue and each of which contributes to a change in the optical power of the intraocular lens upon contraction of the ciliary tissue.
26. The method of claim 25 , wherein each of the two force translation elements are evenly spaced around a periphery of the intraocular lens.
27. The method of claim 1 , wherein each of the at least one force translation elements comprises a material generally harder than a material of the first region of the accommodating intraocular lens.
28. A method of inserting an accommodating intraocular lens into an eye of a patient during a cataract procedure, the method comprising:
removing from said eye an anterior portion of a capsular bag of said eye;
removing from said eye a diseased, natural lens from said capsular bag;
inserting into said capsular bag a first portion of the intraocular lens while leaving a second portion of the intraocular lens inside the eye but outside the capsular bag,
wherein said first portion of the intraocular lens comprises an optical element and wherein said second portion of said intraocular lens comprises at least one force translation element operatively coupled to the intraocular lens, the at least one force translation element capable of changing an optical power of the intraocular lens by applying a radially inward compressive force to a first region of the accommodating intraocular lens to expand a second region of the accommodating intraocular lens; and
engaging the at least one force translation element with a portion of the ciliary tissue,
wherein the intraocular lens further comprises at least one haptic that extends away from the intraocular lens at a first angle, wherein the at least one force translation element extends away from the intraocular lens at a second angle, and wherein the first and second angles are different.