Capsulotomy instrument
First Claim
Patent Images
1. A capsulotomy cutting device for cutting a lens capsule, the device comprising:
- a planar cutting head for cutting the lens capsule, the planar cutting head sized to fit into intraocular tissue, the planar cutting head consisting of one blade, the capsulotomy cutting device not including any other blade, the one blade including at least two sharp edges in a fixed spatial relationship to each other, the at least two sharp edges being on opposite surfaces of the planar cutting head;
an oscillation mechanism coupled to the one blade and that oscillates the one blade at a rate less than 100 Hz; and
a pivot that allows relative rotation of the one blade with respect to the oscillation mechanism during operation of the capsulotomy cutting device, without decoupling the one blade from the oscillation mechanism.
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Abstract
A capsulotomy cutting device includes a planar cutting head sized to fit into intraocular tissue. The planar cutting head includes at least one sharp edge and an oscillation mechanism adapted to oscillate the cutting head. Capsulotomy is achieved by inserting the planar cutting head through an incision in the eyeball, placing the cutting edge of the cutting head against the tissue of the lens capsule therein, and then oscillating the cutting head by an oscillation mechanism coupled to the cutting head.
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Citations
15 Claims
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1. A capsulotomy cutting device for cutting a lens capsule, the device comprising:
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a planar cutting head for cutting the lens capsule, the planar cutting head sized to fit into intraocular tissue, the planar cutting head consisting of one blade, the capsulotomy cutting device not including any other blade, the one blade including at least two sharp edges in a fixed spatial relationship to each other, the at least two sharp edges being on opposite surfaces of the planar cutting head; an oscillation mechanism coupled to the one blade and that oscillates the one blade at a rate less than 100 Hz; and a pivot that allows relative rotation of the one blade with respect to the oscillation mechanism during operation of the capsulotomy cutting device, without decoupling the one blade from the oscillation mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of cutting an incision in a lens capule within an eyeball, comprising;
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inserting a planar cutting head through an incision in the eyeball, the planar cutting head consisting of one blade, the planar cutting head not including any other blade, the one blade including first and second cutting edges in a fixed spatial relationship to each other, the first cutting edge being on an opposing surface of the planer cutting head from the second cutting edge; placing the first cutting edge against tissue of the lens capsule; and oscillating the planer cutting head at a rate less than 100 Hz by an oscillation mechanism coupled to the planer cutting head for cutting the incision in the lens capsule; wherein the first cutting edge has a first shape when it is inserted through the incision and a second shape when placed against tissue, the second shape being different from the first shape; and wherein the first cutting edge has a larger diameter than the incision through which the planar cutting head is inserted.
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Specification