Three-lens intraocular lens system
The present disclosure provides a three-lens IOL system including a first, anterior lens, a second, posterior lens rigidly connected to the first lens by at least one rigid member such that the second lens is a fixed distance from the first lens along an axis, a third, center, moveable lens positioned between the first lens and the second lens and adapted to move linearly along the axis anteriorly in a direction of the first lens or posteriorly in a direction of the second lens to change an optical power of the system, and an articulating actuator that contacts the moveable lens and a capsular bag of an eye when the IOL system is implanted in the capsular bag, the articulating actuator adapted to move the moveable lens linearly along the axis.
1. A multi-lens intraocular lens (IOL) system comprising:
a first lens;
a second lens rigidly connected to the first lens by at least one rigid member such that the second lens is a fixed distance, d from the first lens along an axis;
a third lens positioned between the first lens and the second lens and adapted to move linearly along the axis anteriorly in a direction of the first lens or posteriorly in a direction of the second lens to change an optical power of the system; and
an articulating actuator configured to move the third lens linearly along the axis in response to a force applied by a capsular bag of an eye, wherein the articulating actuator comprises:
a lever point;
a first arm located between the lever point and the third lens and adapted to contact the third lens;
a pad adapted to contact an interior surface of the capsular bag when the IOL system is implanted in the eye; and
a second arm located between the pad and the lever point.
2. The IOL system of claim 1 , wherein:
the first lens has a positive focal length;
the second lens has a negative focal length; and
the moveable lens has a positive focal length.
3. The IOL system of claim 2 , wherein the first lens has a first focal length, the second lens has a second focal length, and the third lens has a third focal length; wherein the optical power of the system is a function of the first focal length, the second focal length, and the third focal length; a nominal system optical power; and a nominal distance t 1 between a center of the third lens and the first lens along the axis.
4. The IOL system of claim 3 , wherein the first focal length is between 18 mm and 28 mm, inclusive, the second focal length is between −4.5 mm and −8.5 mm, inclusive, and the third focal length is between 5 mm and 15 mm, inclusive.
5. The IOL system of claim 1 , wherein the distance d is between 3.00 mm and 4.00 mm, inclusive.
6. The IOL system of claim 1 , wherein the optical power of the IOL system has a range of between 6 diopters and 34 diopters, inclusive.
7. The IOL system of claim 1 , wherein the first arm of the articulating actuator comprises a flexure to facilitate translation of forces on the capsular bag to movement of the third lens.
8. The IOL system of claim 1 , wherein the articulating actuator is adapted to move the third lens posteriorly toward the second lens when the capsular bag contracts.
9. The IOL system of claim 1 , wherein the articulating actuator is configured to move the third lens anteriorly toward the first lens when the capsular bag relaxes.
10. The IOL system of claim 1 , wherein the pad comprises a curved shape for conforming to a curvature of the capsular bag.
11. The IOL system of claim 1 , wherein the pad comprises an annular ring.
12. An intraocular lens (IOL) system, comprising:
a first lens;
a second lens rigidly connected to the first lens by at least one rigid member such that the second lens is a fixed distance, d, from the first lens along an axis;
a third, moveable lens positioned between the first lens and the second lens and adapted to move linearly along the axis in a first direction of the first lens or in a second direction of the second lens to change an optical power of the system; and
an articulating actuator configured to move the third, moveable lens linearly along the axis in response to a force applied by an eye, such that a distance t 1 between the center of the third, moveable lens and the first lens along the axis changes by between 0.1 mm and 0.3 mm.
13. The IOL system of claim 12 , wherein:
the first lens has a positive focal length;
the second lens has a negative focal length; and
the moveable lens has a positive focal length.
14. The IOL system of claim 12 , wherein the distance d is between 3.00 mm and 6.00 mm, inclusive.
15. The IOL system of claim 12 , wherein the articulating actuator comprises:
a lever point;
a first arm located between the lever point and the third, moveable lens and adapted to contact the moveable lens;
a contact adapted to contact an interior surface of the eye when the IOL system is implanted in the eye;
a second arm located between the contact and the lever point;
wherein the first arm and the second arm form an angle θ.