Small incision intraocular lens with anti-PCO feature
View Patent ↗A thin intraocular lens for inhibiting posterior capsular opacification (PCO) includes an optic having an anterior concave region, a posterior concave region, a sharp edge which extends posteriorly and between the posterior concave region and at least a portion of an outer-most peripheral edge surface.
1. An intraocular lens for implanting in a human eye, comprising:
a) a lens optic having opposite anterior and posterior optic surfaces and an optical axis extending from said anterior surface to said posterior surface;
b) a posterior concave region located radially outwardly of said posterior optic surface;
c) an anterior concave region located radially outwardly of said anterior optic surface;
d) an outer-most peripheral edge surface located radially outwardly of said anterior and posterior concave regions; and
e) a posterior sharp edge disposed between the posterior concave region and at least a portion of the outer-most peripheral edge,
wherein the lens has a minimum distance between the posterior concave region and the anterior concave region, the minimum distance being less than a second thickness of the lens at a second location that is disposed radially outwardly of the location of the minimum distance.
2. The intraocular lens of claim 1 , and further comprising at least one haptic extending from said outer-most peripheral edge.
3. The intraocular lens of claim 1 and further comprising an anterior edge surface extending substantially perpendicular to said optical axis between said anterior concave region and said outer-most peripheral edge surface.
4. The intraocular lens of claim 1 wherein said posterior optic surface is convex.
5. The intraocular lens of claim 1 wherein said anterior optic surface is convex.
6. The intraocular lens of claim 1 wherein said anterior and posterior optic surfaces are both convex.
7. The intraocular lens of claim 1 where the radius of said anterior concave region is substantially equal to the radius of said posterior concave region.
8. The intraocular lens of claim 7 wherein said anterior and posterior concave regions are located substantially opposite each other.
9. The intraocular lens of claim 8 wherein the minimum thickness “T 3 ” between said radii is between about 0.10 mm and 0.3 mm.
10. The intraocular lens of claim 2 wherein the thickness “T 1 ” of said haptic is between about 0.20 mm and 0.40 mm.
11. The intraocular lens of claim 7 wherein said anterior and posterior concave regions are located substantially opposite each other and the minimum thickness “T 3 ” between said radii is between about 0.10 mm and 0.3 mm.
12. The intraocular lens of claim 11 , and further comprising at least one haptic extending from said outer-most peripheral edge of said optic.
13. The intraocular lens of claim 12 wherein said thickness “T 3 ” between said radii is less than said thickness “T 1 ” of said haptic.
14. The intraocular lens of claim 1 , wherein the minimum thickness and the second thickness are measured parallel to an optical axis of the lens.
15. The intraocular lens of claim 1 , wherein the second thickness is a thickness at the outer-most peripheral edge.
16. The intraocular lens of claim 1 , wherein both the anterior concave region and the posterior concave region are smoothly curved.
17. The intraocular lens of claim 1 , wherein the posterior concave region is posteriorly facing.
18. The intraocular lens of claim 1 , wherein the posterior concave region is disposed on a posterior face of the lens and the anterior concave region is disposed on an anterior face of the lens.
19. The intraocular lens of claim 1 , wherein the posterior concave region blends smoothly with the posterior optic surface, and the anterior concave region blends smoothly with the anterior optic surface.
20. An intraocular lens for implanting in a human eye, comprising:
a) a lens optic having opposite anterior and posterior optic surfaces and an optical axis extending from said anterior surface to said posterior surface;
b) a posterior concave region located radially outwardly of said posterior optic surface;
c) an anterior concave region located radially outwardly of said anterior optic surface;
d) an outer-most peripheral edge surface located radially outwardly of said anterior and posterior concave regions; and
e) a posterior sharp edge disposed between the posterior optic surface and at least a portion of the outer-most peripheral edge,
wherein the lens has a minimum distance between the posterior concave region and the anterior concave region, the minimum distance being less than a second thickness of the lens at a second location that is disposed radially outwardly of the location of the minimum distance.