Patent ID: 11944575
Assignee: AMO DEVELOPMENT, LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. An ophthalmic surgical laser system to correct low hyperopia and/or myopia, comprising:
a laser delivery system for delivering a femtosecond laser beam into a cornea of an eye;
an XY-scan device to deflect the laser beam laterally;
a Z-scan device to modify a depth of a focus of the laser beam; and
a controller configured to calculate an initial top lenticular shape and an initial bottom lenticular shape in an applanated cornea, wherein the initial top lenticular shape and the initial bottom lenticular shape define an initial space between them, and calculate a shape of an added space in the applanated cornea, wherein the initial top lenticular shape and the initial bottom lenticular shape are calculated based on a predetermined correction power, wherein the shape of the added space is calculated based on the predetermined correction power, and wherein the shape of the added space introduces zero correction power in the cornea in an unapplanated state, and to further calculate a top lenticular incision shape in the applanated cornea based on the initial top lenticular shape and the shape of the added space, and a bottom lenticular incision shape in the applanated cornea based on the initial bottom lenticular shape and the shape of the added space;
wherein the controller is further configured to control the XY-scan device and the Z-scan device to form an incised lenticule in a corneal stroma with the laser beam including incising, while the cornea is applanated by a patient interface device:
a top lenticular incision having the calculated top lenticular incision shape and a circumference;
a bottom lenticular incision having the calculated bottom lenticular incision shape and a circumference; and
a transition ring incision intersecting both the top lenticular incision circumference and the bottom lenticular incision circumference.