Patent ID: 9668919
Date: 2017-06-06
CPC Classifications: A61F

Claim:
1. A method for cataract surgery on an eye of a patient, comprising: scanning a first focus position of a first pulsed laser beam at a first pulse energy of between one-half microjoule and 50 microjoules in a first scanning pattern to photodisrupt a first tissue structure portion with a plurality of pulses of the first laser beam to form an incised surface; and after scanning first focus position of the first laser beam in the first scanning pattern, scanning a second focus position of a second pulsed laser beam having a second pulse energy being between 50 microjoules and 5,000 microjoules in a second scanning pattern that is co-registered to the first scanning pattern to dispose the second focal position on the incised surface for a plurality of pulses of the second laser beam to further photodisrupt the same first tissue structure portion with the second laser beam to further separate segments of the first tissue structure along the incised surface, wherein the pulses of the first laser beam scanned in the first scanning pattern have a first pulse duration between 100 femtoseconds and 10 picoseconds, and the pulses of the second laser beam scanned in the second scanning pattern have a second pulse duration between 10 picoseconds and 10 nanoseconds and is longer than the first pulse duration.