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US 4,732,150 AGranted
Process for cataract extraction
OwnerGerald T. Keener Jr.inventor
Life of this patent
Estimating the term…
Abstract
A process and device for inserting a wire loop around the lens nucleus and then constricting the loop. The constricting loop divides the nucleus in half (or thirds, fourths, etc.), thus allowing it to be removed through an incision of approximately 6.5 mm.
Claims4
In a process for removing a cataract including the steps of:
- (a) peeling the conjunctival layer of the eye from the incision site at the junction of the cornea and sclera;
- (b) making a puncture wound into the anterior chamber of the eye;
- (c) enlarging the puncture wound to provide a larger incision;
- (d) removing the anterior capsule from the cataract;
- and,
- (e) displacing the nucleus into the anterior chamber;
- the improvement which comprises the steps of:
- suspending the nucleus by means of a liquid in such a position that it is separated from internal eye surfaces;
- and
- cutting the nucleus in multiple sections by placing a loop of wire around the nucleus and constricting it and then removing the individual sections through the incision.
7 more elements
In a process for removing a cataract including the steps of:
- (a) peeling the conjunctival layer of the eye from the incision site at the junction of the cornea and sclera;
- (b) making a puncture wound into the anterior chamber of the eye;
- (c) enlarging the puncture wound to provide a larger incision;
- (d) removing the anterior capsule from the cataract;
- and,
- (e) displacing the nucleus into the anterior chamber;
- the improvement which comprises the steps of:
- suspending the nucleus by means of a liquid in such a position that it is separated from internal eye surfaces;
- and,
- dividing the nucleus in multiple sections with a wired instrument by placing a loop of wire around the nucleus and constricting it and then removing the individual sections through the incision.
7 more elements
Dependencies are inferred from the claim text.