Patent ID: 11903878
Assignee: AMO DEVELOPMENT, LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 9:
10. A method implemented in an ophthalmic surgical laser system for incising a cornea of a patient's eye to form a corneal flap, the method comprising:
controlling a laser delivery system of the ophthalmic surgical laser system to deliver a pulsed laser beam to the cornea;
controlling a high frequency scanner of the ophthalmic surgical laser system to scan the pulsed laser beam back and forth to form a laser scan line; and
controlling a scan line rotator, an XY-scanner and a Z-scanner of the ophthalmic surgical laser system to move the laser scan line in the cornea to form the corneal flap, including forming a bed of the flap and forming a side cut of the flap,
wherein the bed is located in a horizontal plane at a first depth from an anterior corneal surface, the bed defining a hinge line, wherein the side cut extends from the bed upwards to the anterior corneal surface to form a side of the flap, the side cut surrounding an entire periphery of the bed except for the hinge line, and
wherein the step of forming the bed includes:
forming a hinge cut along the hinge line by scanning the laser scan line along the hinge line;
forming a first ring cut along a periphery of the bed except for an area of the hinge cut by scanning the laser scan line along a circumference of the bed;
forming a bed cut by scanning the laser scan line in overlapping parallel raster scan passes, the bed cut overlapping at least a part of the hinge cut and the first ring cut and covering all areas of the bed not covered by the hinge cut and the first ring cut; and
forming a second ring cut overlapping the first ring cut by scanning the laser scan line along the circumference of the bed.