Modular intraocular lens designs, tools and methods
Modular IOL removal systems and methods that cut an optic portion of an intraocular in a single motion such to facilitate removal of the optic portion from an eye through an incision, for example a corneal incision, without increasing the size of the corneal incision. Various cutting tools having one or more blades may be utilized. The cut intraocular lens may have one continuous cut or be cut into multiple smaller pieces. The single cutting step may apply balanced forces and torque to avoid damaging the surrounding eye anatomy, reducing the risk of trauma.
1. A method for removing at least a portion of an intraocular lens disposed in a lens capsule of an eye having an anterior chamber, comprising:
a. moving the portion of the intraocular lens from the lens capsule to the anterior chamber;
b. inserting a cutting tool into the anterior chamber;
c. making a single cut motion with the cutting tool to simultaneously form two spaced-apart cut lines in the portion of the intraocular lens to form cut pieces, wherein forming the two spaced-apart cut lines forms first, second, and third cut pieces, the first cut piece being entirely disconnected from the second and third cut pieces, and wherein the second and third cut pieces are connected by an uncut portion of the intraocular lens to form a hinge between the second and third cut pieces; and
d. removing the cut pieces from the eye.
2. A method as in claim 1 , wherein the portion of the intraocular lens and the cut pieces have a lateral width, and wherein the lateral width of the cut pieces is less than half the lateral width of the portion of the intraocular lens.
3. A method as in claim 1 , wherein the two spaced-apart cut lines are made by spaced apart blades of the cutting tool.
4. A method as in claim 1 , further comprising grasping the portion of the intraocular lens with the cutting tool before cutting the portion of the intraocular lens, wherein grasping the portion of the intraocular lens with the cutting tool includes decreasing a size of a gap between a first arm of the cutting tool and a second arm of the cutting tool to grasp the portion of the intraocular lens with the first and second arms of the cutting tool, and wherein at least a portion of the first arm extends parallel to at least a portion of the second arm.
5. A method as in claim 1 , wherein the intraocular lens includes an optic portion connected to a base portion, the method further comprising:
disengaging the optic portion from the base portion within the lens capsule;
moving the optic portion from the lens capsule to the anterior chamber while leaving the base portion in the lens capsule; and
forming the two spaced-apart cut lines in the optic portion.
6. A method as in claim 1 , wherein simultaneously forming the two spaced-apart cut lines includes simultaneously forming the two spaced-apart cut lines on opposite sides of the first cut piece.
7. A method for removing at least a portion of an intraocular lens disposed in a lens capsule of an eye having an anterior chamber, comprising:
a. moving the portion of the intraocular lens from the lens capsule to the anterior chamber;
b. inserting a cutting tool into the anterior chamber;
c. making a single cut motion with the cutting tool to form two spaced-apart cut lines in the portion of the intraocular lens to form cut pieces, wherein forming the two spaced-apart cut lines forms first, second, and third cut pieces, the first cut piece being entirely disconnected from the second and third cut pieces, and wherein the second and third cut pieces are connected by an uncut portion of the portion of the intraocular lens to form a hinge between the second and third cut pieces; and
d. removing the first, second, and third cut pieces from the eye.
8. A method as in claim 7 , wherein removing the first, second, and third cut pieces from the eye includes removing the second and third cut pieces from the eye, while the second and third cut pieces are connected by the uncut portion, after removing the first cut piece from the eye.