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US 10,369,052 B2Granted
Systems and methods for lenticular laser incision
AssigneeAMO Development, LLC
InventorHong Fu
Life of this patent
Estimating the term…
Abstract
Embodiments of this invention generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incision. In an embodiment, an ophthalmic surgical laser system comprises a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye, an XY-scan device to deflect the pulsed laser beam, a Z-scan device to modify a depth of a focus of the pulsed laser beam, and a controller configured to form a top lenticular incision and a bottom lenticular incision of a lens in the subject's eye.
Claims14
An ophthalmic surgical laser system comprising:
- a laser delivery system for delivering a focus of a pulsed laser beam to a target in a subject's eye;
- a high frequency scanner to scan the focus of the pulsed laser beam back and forth parallel to an XY plane at a predefined frequency;
- an XY-scanner to deflect the focus of the pulsed laser beam parallel to the XY plane, the XY-scanner being different from the high frequency scanner;
- a Z-scanner to modify a depth of the focus of the pulsed laser beam, the depth being in a Z direction perpendicular to the XY plane;
- and
- a controller configured to control the high frequency scanner, the XY-scanner and the Z-scanner to successively form a plurality of sweeps which collectively form at least one lenticular incision of a lens in the subject's eye, the lens having a curved surface that defines an apex and a Z axis passing through the apex, wherein each sweep is formed by:
- controlling the high frequency scanner to deflect the pulsed laser beam back and forth to form a scan line, the scan line being a straight line having a predefined length and being parallel to the XY plane and tangential to a parallel of latitude of the lens, the parallel of latitude being a circle on the surface of the lens that is perpendicular to the Z axis and has a defined distance to the apex, while controlling the XY-scanner and the Z-scanner to move the scan line along a meridian of longitude of the lens, the meridian of longitude being a curve that passes through the apex and has a defined angular position around the Z axis, wherein the plurality of sweeps are successively formed one after another along the respective meridians of longitude which are different from one another.
4 more elements
A method for creating a lenticular incision using an ophthalmic surgical laser system, the method comprising the steps of:
- generating a pulsed laser beam;
- delivering a focus of the pulsed laser beam to a target in a subject's eye;
- scanning, by a high frequency scanner, the focus of the pulsed laser beam back and forth parallel to an XY plane at a predefined frequency;
- deflecting, by an XY-scanner, the focus of the pulsed laser beam parallel to the XY plane, the XY-scanner being different from the high frequency scanner;
- modifying, by a Z-scanner, a depth of the focus of the pulsed laser beam, the depth being in a Z direction perpendicular to the XY plane;
- and
- controlling, by a controller, the high frequency scanner, the XY-scanner and the Z-scanner to successively form a plurality of sweeps which collectively form at least one lenticular incision of a lens in the subject's eye, the lens having a curved surface that defines an apex and a Z axis passing through the apex, including forming each sweep by:
- controlling the high frequency scanner to deflect the pulsed laser beam back and forth to form a scan line, the scan line being a straight line having a predefined length and being parallel to the XY plane and tangential to a parallel of latitude of the lens, the parallel of latitude being a circle on the surface of the lens that is perpendicular to the Z axis and has a defined distance to the apex, while controlling the XY-scanner and the Z-scanner to move the scan line along a meridian of longitude of the lens, the meridian of longitude being a curve that passes through the apex and has a defined angular position around the Z axis, wherein the plurality of sweeps are successively formed one after another along the respective meridians of longitude which are different from one another.
5 more elements
Dependencies are inferred from the claim text.