Method for patterned plasma-mediated modification of the crystalline lens
A method of treating a lens of a patient's eye includes generating a light beam, deflecting the light beam using a scanner to form a treatment pattern of the light beam, delivering the treatment pattern to the lens of a patient's eye to create a plurality of cuts in the lens in the form of the treatment pattern to break the lens up into a plurality of pieces, and removing the lens pieces from the patient's eye. The lens pieces can then be mechanically removed. The light beam can be used to create larger segmenting cuts into the lens, as well as smaller softening cuts that soften the lens for easier removal.
1. A system for treating a cataractous lens of a patient's eye, comprising:
a. a laser source for generating a light beam;
b. a scanning system for deflecting the light beam to form a treatment pattern of the light beam;
c. a controller operably coupled to the laser source and scanning system and configured to operate the scanner to form the treatment pattern for forming a plurality of cuts in the lens in the form of the treatment pattern so as to segment the lens tissue into a plurality of patterned pieces, the treatment pattern comprising a spiral shaped incision and a plurality of sub-segment incisions as viewed from an anterior to a posterior position along the optical axis and extending along a length between a posterior cutting limit within the lens and an anterior surface of the lens capsule, wherein each of the plurality of sub-segment incision extends between and connects two portions of the spiral shaped incision that are located at different radii, and wherein none of the plurality of sub-segment incisions is radially aligned with another one of the plurality of sub-segment incisions.
2. The system of claim 1 , comprising imaging system operable to acquire image signals from targeted structures of the patient's lens; and operating a computer electronics system to process data comprising acquired image signals, so as to determine one or more parameters of a treatment zone positioned within the lens.
3. The system of claim 1 , wherein the processed data further comprises user input data.
4. The system of claim 1 , comprising incising an opening in an anterior surface of the lens capsule prior to delivering the treatment pattern.