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 three-lens intraocular lens (IOL) system comprising:
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, d 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, the articulating actuator comprising:
a lever point;
a first arm located between the lever point and the moveable lens and adapted to contact the moveable lens;
a contact 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 contact and the lever point;
wherein the first and second arms form an angle θ; and
wherein the articulating actuator is adapted such that the first arm pivots around the lever point to form a more obtuse angle with the second arm when the capsular bag relaxes and to move the moveable lens anteriorly towards the first lens as a result.
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 moveable 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 moveable 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 6.00 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 a distance t 1 between the center of the moveable lens and the first lens along the axis changes by between 0.1 mm and 0.3 mm, inclusive, in response to a movement of the articulating actuator.
8. The IOL system of claim 1 , wherein the articulating actuator is adapted to move the moveable lens posteriorly toward the second lens when the capsular bag contracts.
9. A three-lens intraocular lens (IOL) system, comprising:
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, d 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;
wherein a distance t 1 between the center of the moveable lens and the first lens along the axis changes by between 0.1 mm and 0.3 mm, inclusive, in response to a movement of the articulating actuator.
10. The IOL system of claim 9 , 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.
11. The IOL system of claim 9 , wherein the distance d is between 3.00 mm and 6.00 mm, inclusive.
12. The IOL system of claim 9 , wherein the optical power of the IOL system has a range of between 6 diopters and 34 diopters, inclusive.
13. The IOL system of claim 9 , wherein the articulating actuator comprises:
a lever point;
a first arm located between the lever point and the moveable lens and adapted to contact the moveable lens;
a contact adapted to contact an interior surface of the capsular bag when the IOL system is implanted in the eye;
a second arm located between the contact and the lever point,
wherein the first and second arm form an angle θ.
14. A three-lens intraocular lens (IOL) system, comprising:
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, d 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, the articulating actuator comprising:
a lever point;
a first arm located between the lever point and the moveable lens and adapted to contact the moveable lens;
a contact 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 contact and the lever point;
wherein the first and second arm form an angle θ; and
wherein the articulating actuator is adapted such that the first arm pivots around the lever point to form a more acute angle with the second arm when the capsular bag tightens and to move the moveable lens posteriorly towards the second lens as a result.
15. The IOL system of claim 14 , wherein the articulating actuator is further adapted such that the first arm pivots around the lever to form a more obtuse angle with the second arm when the capsular bag relaxes and to move the moveable lens anteriorly towards the first lens as a result.
16. The IOL system of claim 14 , wherein the distance d is between 3.00 mm and 6.00 mm, inclusive.