System and method for improving the accomodative amplitude and increasing the refractive power of the human lens with a laser
A system and method for increasing the amplitude of accommodation and/or changing the refractive power of lens material of a natural crystalline lens is provided. Generally, there is provided methods and systems for delivering a laser beam to a lens of an eye in a plurality of patterns results in the increased accommodative amplitude and/or refractive power of the lens. There is further provided a system and method of treating presbyopia by increasing both the flexibility of the human lens and the depth of field of the eye.
1. A method for delivering a laser beam to a lens of an eye in a plurality of patterns comprising:
providing a laser;
providing an optical path for directing a laser beam from the laser to the lens of the eye;
directing the laser beam in a first pattern on a first portion of the lens of the eye;
the first pattern generally following the shape of the outer surface of the lens of the eye;
directing the laser beam in a second pattern on a second portion of the lens of the eye;
the second pattern having a pattern to cover a specific volume of the second portion of the lens of the eye;
the relationship of the first pattern to the second pattern being such that the first pattern is positioned within the lens closer to the lens outer surface than the second pattern; and,
both the first and second patterns positioned within the lens of the eye such that both patterns avoid the central portion of the lens of the eye.
2. The method of claim 1 , wherein the second pattern is cubic.
3. The method of claim 1 , wherein the first pattern comprises a plurality of nested shells.
4. The method of claim 1 , wherein the first pattern comprises a plurality of nested shells that follows the anterior surface of the lens of the eye.
5. The method of claim 1 , wherein the first pattern comprises a plurality of nested shells that follows the posterior surface of the lens of the eye.
6. The method of claim 1 , wherein the first pattern comprises a plurality of nested shells that follow the entire curvature of the lens of the eye from anterior to posterior, excluding the surface adjacent to the area avoided.
7. The method of claim 1 , wherein the first pattern is directed to the lens of the eye before the second pattern.
8. The method of claim 1 , wherein the second pattern is directed to the lens of the eye before the first pattern.
9. The method of claim 1 , wherein the first and second patterns are delivered substantially simultaneously.
10. The method of claim 1 , wherein the central area avoided and has a width of about 1 mm centered approximately on an optical axis of the lens.
11. The method of claim 1 , wherein the central area avoided is cylindrical in shape and has a diameter greater than about 1 mm centered approximately around an optical axis of the lens.
12. The method of claim 1 , wherein the central area avoided has a width of about 1.5 mm centered approximately on an optical axis of the lens.
13. The method of claim 1 , wherein the central area avoided is cylindrical in shape and has a diameter greater than about 1.5 mm centered approximately around an optical axis of the lens.
14. The method of claim 1 , wherein the central area avoided has a width of about 0.2 mm to about 4 mm centered approximately on an optical axis of the lens.
15. The method of claim 1 , wherein the central area avoided is cylindrical in shape and has a diameter of about 0.2 mm to about 4 mm centered approximately around an optical axis of the lens.
16. The method of claim 4 , wherein the central area avoided is cylindrical in shape and has a diameter of about 0.2 mm to about 4 mm centered approximately around optical axis of the lens.
17. The method of claim 1 , wherein the central area avoided has a diameter of about 0.5 mm to about 3 mm centered approximately around an optical axis of the lens.
18. The method of claim 1 , wherein the central area avoided is cylindrical in shape and has a diameter of about 2 mm centered approximately around an optical axis of the lens.
19. The method of claim 1 , wherein the second pattern is different from the first pattern.
20. A system for delivering a laser beam to a lens of an eye in a plurality of patterns comprising:
a laser;
an optical path for directing a laser beam from the laser to the lens of the eye;
a control system for at least directing the laser beam in a first pattern on a first portion of the lens of the eye; and, directing the laser beam in a second pattern on a second portion of the lens of the eye;
the first pattern generally following the shape of the outer surface of the lens of the eye;
the second pattern having a pattern to cover a specific volume of the second portion of the lens of the eye;
the relationship of the first pattern to the second pattern being such that the first pattern is positioned within the lens closer to the lens outer surface than the second pattern; and
both the first and second patterns positioned within the lens of the eye such that both patterns avoid the central portion of the lens of the eye.
21. The system of claim 20 , wherein the first shot pattern comprises a plurality of nested shells that follows the posterior surface of the lens of the eye.