System astigmatism using multiple paired arcuate laser generated corneal incisions
AssigneeLensar, Inc.
InventorsEric Valas Teuma, Rudolph W. Frey, Steven E. Bott
Life of this patent
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Abstract
A method for the reduction or elimination of astigmatism in an eye that includes an astigmatism axis, the method including determining an astigmatism axis of an eye and forming a first set of incisions in a cornea of the eye that are bisected by the astigmatism axis. The method including forming a second set of incisions in the cornea that are bisected by the astigmatism axis, wherein the first set of incisions and the second set of incisions reduce or eliminate astigmatism in the eye.
Claims19
A system for providing arcuate shot patterns to an eye for reducing astigmatism induced from cataract therapy, the system comprising:
- a) a therapeutic laser for producing a laser beam;
- b) a control system configured to maintain data and perform calculations;
- wherein the control system is configured to deliver the laser beam to the eye in a predetermined first arcuate shot pattern configured to provide a first set of arcuate incisions in a cornea of the eye and
- a predetermined second arcuate shot pattern configured to provide a second set of arcuate incisions in the cornea;
- c) the control system comprising an induced astigmatism axis for the eye;
- and,
- d) the control system configured to control optics for guiding the laser beam and directing the laser beam to the eye, based at least in part upon the induced astigmatism axis, so that the following are formed:
- the first set of arcuate incisions in the cornea that cut across and are bisected by the induced astigmatism axis of the eye and configured and positioned on the cornea to reduce or eliminate an induced astigmatism in the eye;
- and the second set of arcuate incisions in the cornea that cut across and are bisected by the induced astigmatism axis and configured and positioned on the cornea to reduce or eliminate the induced astigmatism in the eye;
- e) wherein at least one incision of the first set of acuate incisions has a start point at a surface of the cornea and an end point within the cornea at a first vertical level, and at least one of the second set of arcuate incisions has a start point at the surface of the cornea and an end point within the cornea at a second vertical level;
- a distance between the surface of the cornea and the first vertical level thereby defining a depth of the at least one of the first set of arcuate incisions, and a distance between the surface of the cornea and the second vertical level thereby defining a depth of the at least one of the second set of arcuate incisions;
- and the depth of the at least one of the first set of arcuate incision and the at least one of the second set of arcuate incisions ranging from 40% to 80% of the thickness of the cornea.
Dependencies are inferred from the claim text.