Lens capsule tension devices
View Patent ↗The present disclosure relates generally to the fields of medical devices, ophthalmology, and cataract surgery, and more particularly to, for example, a capsular tension ring. The capsular tension ring can include an inner ring section, and an outer ring section at least partially enveloping the inner ring section. The outer ring section can have an outer ring surface, an inner ring surface, and a plurality of raised polygon features on the inner ring surface, wherein each of the raised polygon features is radially symmetric.
1. A capsular tension ring configured to be anchored in place within a lens capsule of an eye, the capsular tension ring comprising:
an inner ring section; and
an outer ring section at least partially enveloping the inner ring section, the outer ring section comprising:
an outer ring surface;
an inner ring surface, the outer ring surface and the inner ring surface each being annular surfaces extending about a central axis forming a geometric center of the capsular tension ring, wherein the inner ring section is disposed between the outer ring surface and the inner ring surface relative to the geometric center;
a plurality of raised features disposed on the outer ring surface and extending outwardly of the geometric center from the outer ring surface; and
a plurality of raised features disposed on the inner ring surface and extending inwardly toward the geometric center from the inner ring surface,
wherein each of the raised polygon features is radially symmetric, and
wherein the plurality of raised features disposed on the outer ring surface are configured to secure the capsular tension ring in place within the lens capsule of the eye.
2. The capsular tension ring of claim 1 , wherein the inner ring section is made from a wire and the outer ring section is made from an elastic material molded or deposited over the wire.
3. The capsular tension ring of claim 2 , wherein the wire is a nitinol wire and the elastic material is silicone.
4. The capsular tension ring of claim 1 , wherein each of the raised features protrudes from the inner ring surface towards a geometric center of the capsular tension ring, and wherein each of the raised features has opposing sides extending substantially parallel to each other towards the geometric center.
5. The capsular tension ring of claim 1 , each of the raised features on the inner ring surface has opposing sides that curve towards each other.
6. The capsular tension ring of claim 1 , wherein an angle subtended from a central axis of the inner ring section by an adjacent pair of the raised features on the inner ring surface is between 0.5 degrees and 10 degrees.
7. The capsular tension ring of claim 6 , wherein the angle subtended is between 0.5 degrees and 5 degrees.
8. The capsular tension ring of claim 7 , wherein the angle subtended is between 0.5 degrees and 3 degrees.
9. The capsular tension ring of claim 1 , wherein the sides of each of the raised features are sloped from a corresponding inner or outer ring surface at an angle of between 30 degrees to 100 degrees.
10. The capsular tension ring of claim 1 , wherein each of the raised features has opposing sides that extend substantially parallel to each other.
11. The capsular tension ring of claim 1 , wherein each of the raised features has opposing sides that converge towards each other in a radial inward direction.
12. The capsular tension ring of claim 1 , wherein each of the raised features has a rectangular profile.
13. A capsular tension ring configured to be anchored in place within a lens capsule of an eye, the capsular tension ring comprising:
an inner ring annular surface extending circumferentially about a geometric center of the capsular tension ring;
an outer ring annular surface extending circumferentially about the geometric center of the capsular tension ring and concentric to the inner ring annular surface, wherein a first width between the inner ring annular surface and the outer ring annular surface is the thinnest section of the capsular tension ring;
a first end having a first eyelet;
a second end having a second eyelet, wherein the first and second ends are movable towards each other upon compression of the capsular tension ring;
a plurality of raised features disposed on the outer ring annular surface, each protruding away from the geometric center from the outer ring annular surface, and configured to secure the capsular tension ring in place within the lens capsule of the eye; and
a plurality of raised features disposed on the inner ring annular surface, each protruding towards the geometric center of the capsular tension ring from the inner ring annular surface, wherein a second width between peaks of opposing raised features disposed on the inner and outer ring annular surfaces is the thickest section of the capsular tension ring, and wherein each of the raised features is radially symmetric.
14. The capsular tension ring of claim 13 , wherein each of the raised features on the inner ring annular surface has opposing sides that curve towards each other.
15. The capsular tension ring of claim 13 , wherein each of the raised features has opposing sides that are each sloped at an angle of less than 90 degrees.
16. The capsular tension ring of claim 13 , wherein an angle subtended from the geometric center by an adjacent pair of the raised features on the inner ring annular surface is between 0.5 degrees and 10 degrees.
17. The capsular tension ring of claim 16 , wherein the angle subtended is between 0.5 degrees and 5 degrees.
18. The capsular tension ring of claim 16 , wherein the angle subtended is between 0.5 degrees and 3 degrees.
19. The capsular tension ring of claim 13 , wherein each of the raised features has opposing sides that converge towards each other in a radial inward direction.
20. A capsular tension ring comprising:
an open ring structure configured to circumferentially fit within a lens capsule of an eye, the open ring structure comprising:
an outer ring surface;
an inner ring surface, wherein the outer ring surface and the inner ring surface are concentric annular surfaces extending about a geometric center of the capsular tension ring, the outer ring surface and the inner ring surface disposed apart at a constant width;
a plurality of raised features disposed on the outer ring surface and extending outwardly of the geometric center from the outer ring surface; and
a plurality of raised features disposed on the inner ring surface and extending inwardly toward the geometric center from the inner ring surface, wherein the plurality of raised features disposed on the outer ring surface are configured to secure the capsular tension ring in place within the lens capsule of the eye.
21. The capsular tension ring of claim 20 , wherein each of the raised features has opposing sides that curve towards each other.
22. The capsular tension ring of claim 20 , wherein an angle subtended from a geometric center of the open ring structure by an adjacent pair of the raised features is between 0.5 degrees and 10 degrees.
23. The capsular tension ring of claim 20 , wherein the open ring structure further comprises a first end and a second end, wherein at least one of the first end or the second end comprises an eyelet.
24. A capsular tension ring configured to be anchored in place within a lens capsule of an eye, the capsular tension ring comprising:
an inner ring surface extending circumferentially about a geometric center of the capsular tension ring;
an outer ring surface extending circumferentially about the geometric center of the capsular tension ring at a constant distance from the inner ring surface;
a first end having a first eyelet;
a second end having a second eyelet, wherein the first and second ends are movable towards each other upon compression of the capsular tension ring; and
a plurality of raised features on the outer ring surface and on the inner ring surface, wherein each of the raised features on the inner ring surface protrudes towards the geometric center from the inner ring surface and each of the raised features on the outer ring surface protrudes away from the geometric center, and wherein the plurality of raised features on the outer ring surface are configured to secure the capsular tension ring in place within the lens capsule of the eye.
25. The capsular tension ring of claim 24 , wherein each of the raised features on the inner ring surface has opposing sides that curve towards each other.
26. The capsular tension ring of claim 24 , wherein an angle subtended from the geometric center by an adjacent pair of the raised features on the inner ring surface is between 0.5 degrees and 10 degrees.
27. The capsular tension ring of claim 20 , wherein each of the raised features has opposing sides that converge towards each other in a radial inward direction.
28. The capsular tension ring of claim 20 , wherein each of the raised features has opposing sides, each opposing side sloped at an angle of less than 90 degrees.
29. The capsular tension ring of claim 24 , wherein each of the raised features has opposing sides that converge towards each other in a radial inward direction.
30. The capsular tension ring of claim 24 , wherein each of the raised features has opposing sides, each opposing side sloped at an angle of less than 90 degrees.