US 11,654,052 B2
High speed corneal lenticular incision using a femtosecond laser
Hong Fu, Pleasanton, CA (US); Alireza Malek Tabrizi, Fremont, CA (US); and Nima Khatibzadeh, San Jose, CA (US)
Assigned to AMO Development, LLC, Irvine, CA (US)
Filed by AMO DEVELOPMENT, LLC, Irvine, CA (US)
Filed on Nov. 11, 2020, as Appl. No. 17/95,722.
Application 17/095,722 is a continuation of application No. 16/057,740, filed on Aug. 7, 2018, granted, now 10,842,674.
Prior Publication US 2021/0128358 A1, May 6, 2021
Int. Cl. A61F 9/008 (2006.01); A61B 18/20 (2006.01)
CPC A61F 9/00804 (2013.01) [A61F 9/00814 (2013.01); A61B 2018/20353 (2017.05); A61B 2018/20553 (2017.05); A61B 2018/205547 (2017.05); A61F 9/00827 (2013.01); A61F 2009/0087 (2013.01); A61F 2009/00897 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An ophthalmic surgical laser system comprising:
a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye;
a high frequency scanner to scan the pulsed laser beam back and forth at a predefined frequency;
an XY-scanner to deflect the pulsed laser beam, the XY-scanner being separate from the high frequency scanner;
a Z-scanner to modify a depth of a focus of the pulsed laser beam; 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 to form a scan line, the scan line being a straight line having a predefined length and being 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,
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, and
controlling the laser delivery system to vary a laser pulse energy during each sweep to use a lower laser pulse energy when the scan line is located within a vicinity of the apex of the lenticule than when the scan line is located at an edge of the lenticule,
wherein the plurality of sweeps are successively formed one after another along the respective meridians of longitude which are different from one another.