Devices for reconstruction of a lens capsule after cataract surgery
Provided herein are devices used to reconstruct a natural lens capsule after a cataract surgery. The device flexibly adapts to the tension of the lens capsule as it is relaxed or contracted. This device comprises a ring-shaped rigid component. The rigid component comprises a distal end in contact with an anterior surface of the capsule and a proximal end disposed on a posterior surface of the capsule and disposed against a Wieger's ligament of the eye. A ring-shaped flexible component substantially concentric with the rigid component is flexibly fitted against an inner surface of the capsule. The ring-shaped flexible component comprises a proximal end formed on an outer surface of a proximal end of the rigid component, and a distal end extending away from the rigid component. A groove is disposed on an inner surface of the rigid component configured to receive haptics on an intraocular lens.
1. A prosthetic capsular device for reconstructing a natural lens capsule of an eye after a cataract surgery, the device comprising a housing configured to receive an intraocular lens (IOL), the housing consisting of:
a ring-shaped rigid component comprising:
a distal end with a thickness of about 0.1 mm to about 0.5 mm, the distal end sized and configured to contact an anterior surface of the natural lens capsule;
an anterior central opening defined at said distal end, the anterior central opening having a perimeter capable of allowing insertion of an intraocular lens;
a ledge formed from a top of the distal end, the ledge comprising a capsular-engaging top surface;
a plurality of markers disposed on said top surface of the ledge;
a proximal end with a thickness of about 0.2 mm to about 1 mm, the proximal end comprising a capsular-engaging surface sized and configured to be disposed in a supporting relationship with a posterior surface of the natural lens capsule and configured to be disposed against a Wieger's ligament in the eye; and
a circumferential wall extending from said proximal end to said distal end;
a ring-shaped flexible component substantially concentric with said rigid component with a thickness of about 0.05 mm to about 0.75 mm that is less than the thickness of the distal end of the rigid component or the thickness of the proximal end of the rigid component, the ring-shaped flexible component defining a capsular-engaging circumferential wall sized and configured to flexibly fit against an inner surface of the natural lens capsule, said ring-shaped flexible component comprising:
a proximal end formed on an outer surface of the proximal end of the rigid component;
a distal end extending anteriorly and away from said rigid component, said distal end being a free end; and
a plurality of gaps disposed around a circumference of the flexible component; and
a groove formed on an inner surface of the rigid component configured to receive haptics of an intraocular lens,
wherein the ring-shaped flexible component is disposed around outer circumference of the circumferential wall of the ring-shaped rigid component,
wherein the ring-shaped flexible component is configured to flex away from the ring-shaped rigid component when ciliary muscles are relaxed and zonules are tense,
wherein a maximum thickness of the distal end of the ring-shaped rigid component is less than a maximum thickness of the proximal end of the ring-shaped rigid component.
2. The device of claim 1 , wherein the plurality of markers is a guide for a toric lens alignment.
3. The device of claim 1 , wherein said ledge has a width of about 0.1 mm to about 1 mm.
4. The device of claim 1 , wherein said ring-shaped rigid component is substantially perpendicular to the anterior surface of the natural lens capsule.
5. The device of claim 1 , wherein said ring-shaped flexible component is configured to flex toward the rigid component when the ciliary muscles are contracted and the zonules are relaxed.
6. The device of claim 1 , wherein said gaps each have a width of about 0.1 mm to about 5 mm.
7. The device of claim 1 , wherein said ring-shaped rigid component and said ring-shaped flexible component form an angle of about 2 degrees to about 90 degrees when fitted inside the natural lens capsule.
8. A prosthetic capsular device for flexibly restoring tension for a natural lens capsule after a cataract surgery, the device comprising a housing configured to receive an intraocular lens (IOL), the housing consisting of:
a ring-shaped rigid component comprising:
a distal end with a thickness of about 0.1 mm to about 0.5 mm, the distal end sized and configured to be disposed in a supporting relationship with an anterior surface of the natural lens capsule;
an anterior central opening defined at said distal end, the anterior central opening having a perimeter capable of allowing insertion of an intraocular lens;
a proximal end with a thickness of about 0.2 mm to about 1 mm, the proximal end comprising a capsular-engaging surface sized and configured to be disposed in a supporting relationship with a posterior surface of the natural lens capsule and configured to be disposed against a Wieger's ligament of the eye;
a ledge formed from a top of the distal end of the rigid component, said ledge comprising a capsular-engaging top surface and a plurality of markers disposed on said top surface; and
a circumferential wall extending from said proximal end to said distal end;
a ring-shaped flexible component substantially concentric with said rigid component with a thickness of about 0.05 mm to about 0.75 mm that is less than the thickness of the distal end of the rigid component or the thickness of the proximal end of the rigid component, the ring-shaped flexible component defining a capsular-engaging circumferential wall sized and configured to flexibly fit against an inner surface of the natural lens capsule, said ring-shaped flexible component comprising:
a proximal end formed on an outer surface of the proximal end of the rigid component;
a distal end extending anteriorly and away from said rigid component, said distal end being a free end; and
a plurality of gaps disposed around a circumference of the ring-shaped flexible component configured to improve flexibility; and
a groove formed on an inner surface of the rigid component configured to receive haptics of an intraocular lens,
wherein the ring-shaped flexible component is disposed around outer circumference of the circumferential wall of the ring-shaped rigid component,
wherein the ring-shaped flexible component is configured to flex away from the ring-shaped rigid component when ciliary muscles are relaxed and zonules are tense, and configured to flex toward said ring-shaped rigid component when the ciliary muscles are contracted and the zonules are relaxed,
wherein a maximum thickness of the distal end of the ring-shaped rigid component is less than a maximum thickness of the proximal end of the ring-shaped rigid component.
9. The device of claim 8 , wherein the plurality of markers is a guide for a toric lens alignment.
10. The device of claim 8 , wherein said gaps each have a width of about 0.1 mm to about 5 mm.
11. The device of claim 8 , wherein said ledge has a width of about 0.1 mm to about 1 mm.
12. The device of claim 8 , wherein said ring-shaped rigid component is substantially perpendicular to the anterior surface of the natural lens capsule.
13. The device of claim 8 , wherein said ring-shaped rigid component and said ring-shaped flexible component form an angle of about 0 degree to about 90 degrees when disposed inside the natural lens capsule.