Patent ID: 11865042
Assignee: AMO DEVELOPMENT, LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A laser surgical method for performing a corneal incision in an eye of a patient while maintaining iris exposure below a predetermined exposure limit, the method comprising:
generating a simulated initial treatment scan pattern of a pulsed laser treatment beam corresponding to a predetermined corneal incision in the eye;
calculating an initial exposure level, which is an amount of laser energy per unit area of the pulsed laser treatment beam on an iris tissue of the eye caused by the initial treatment scan pattern;
determining whether the initial exposure level satisfies a predetermined safe exposure condition which is below an exposure that causes a minimal visible lesion in the iris tissue;
generating a simulated revised treatment scan pattern of the pulsed laser treatment beam for incising the corneal tissue which is different from the initial treatment scan pattern and which comprises one or more treatment scan modifying elements when the initial indication of exposure level fails to satisfy the predetermined safe exposure condition, wherein the one or more treatment scan modifying elements cause a calculated revised exposure level, which is an amount of laser energy per unit area of the pulsed laser treatment beam on the iris tissue caused by the revised treatment scan pattern, to satisfy the predetermined safe exposure condition,
wherein the one or more treatment modifying elements comprises: (1) an extension of a scan path of the scan pattern so that a portion of each turnaround of the scan path occurs beyond an incision boundary, the extension of the scan path being greater than 50% of a turnaround distance of the scan path, or (2) an extension of the scan path of the scan pattern so that a portion of each turnaround of the scan path is gated and extends beyond the incision boundary, the extension of the scan path being greater than 50% of a turnaround distance of the scan path, or (3) a reoriented scan axis, wherein the reoriented axis is reoriented along an axis corresponding to a largest distance between opposing incision boundaries, or (4) a plurality of gated rows of a scan path inserted among active rows of the scan path in a fixed proportion, the fixed proportion being greater than or equal to one, and less than or equal to 10; and
scanning a focal zone of the pulsed laser treatment beam according to the revised treatment scan pattern, thereby performing the corneal incision.