US 12,290,474 B2
Ophthalmic laser surgical system and method for wavefront-guided corneal lenticule extraction for vision correction
Hong Fu, Pleasanton, CA (US)
Assigned to AMO Development, LLC, Irvine, CA (US)
Filed by AMO Development, LLC, Irvine, CA (US)
Filed on Mar. 1, 2022, as Appl. No. 17/653,127.
Prior Publication US 2023/0277377 A1, Sep. 7, 2023
Int. Cl. A61F 9/008 (2006.01); A61F 9/013 (2006.01)
CPC A61F 9/00827 (2013.01) [A61F 9/013 (2013.01); A61F 2009/0088 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method implemented in an ophthalmic laser system for forming lenticule incisions in a cornea of an eye, comprising:
coupling the eye to the ophthalmic laser system to applanate the eye;
obtaining a wavefront map which has been registered to the cornea of the applanated eye and defined at an anterior surface of the cornea;
calculating a lenticule thickness profile which represents a thickness of cornea tissue to be removed based on the wavefront map and a correction factor using

OG Complex Work Unit Math
where Δ(r, φ) is the lenticule thickness as a function of a radius r from a Z axis and a meridian angle φ around the Z axis, RK is an average radius of curvature of the cornea anterior surface before applanation, L is a radius of an optical zone of the lenticule, nc is a refractive index of the cornea, W(r, φ) is the wavefront map, Wmax is a parameter corresponding to a maximum value of the wavefront, and γMT denotes the correction factor;
calculating cutting profiles for a bottom lenticule incision surface and a top lenticule incision surface based on the lenticule thickness profile; and
operating the ophthalmic laser system to incise the cornea according to the cutting profiles to form the bottom and top lenticule incision surfaces.