Method for intrastromal photodisruption of dome-shaped surfaces

Details Method for intrastromal photodisruption of dome-shaped surfaces Method for intrastromal photodisruption of dome-shaped surfaces

2007-07-03

2007-07-03

Farah, A. (Department: 3735)

Surgery

Instruments

Light application

C606S004000, C606S010000, C128S898000

Reexamination Certificate

active

10835087

ABSTRACT:
A method is disclosed for photodisrupting a surface in the stroma of an eye at a substantially constant distance from the anterior surface of the eye. A frame of reference is established for the eye that includes an axis of rotation. Next, the focal point of a laser beam is positioned in the stroma at a radial distance from the axis. At least one laser pulse is delivered to the stromal tissue at the focal point, photodisrupting the tissue there and creating a photodisruption bubble having a diameter “d”. The focal point is then rotated about the axis through an arc length substantially equal to “d” and the photodisruption step is repeated. During rotation, the distance between the focal point and the axis is decreased at a rate substantially equal to the distance “d” per revolution. The method can be used to create a flap for a LASIK type procedure.

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