Patent ID: 9398979
Filing Date: 2016-07-26
CPC Classification: A61F

Claim Text:
1. An apparatus for directing a focal spot of a surgical laser beam to tissue in a treatment area of an eye during ocular surgery, with compensation for defects in laser beam position and quality caused by surface irregularities introduced during a manufacture of a patient interface, the apparatus comprising: a patient interface having a posterior surface; a beam delivery system including a scanning subsystem for guiding the surgical laser beam along a beam path through the patient interface and to a desired focal spot location in the treatment area; an optical detector for creating image data including data representing at least a portion of the posterior surface of the patient interface; and a computer system configured to receive image data from the optical detector and processing said image data to compare at least a portion of the posterior surface with a reference datum, wherein the reference datum is a computer model of a posterior surface of a patient interface having no surface irregularities, to calculate a z-axis deviation from the reference datum and a tilt deviation from the reference datum for the posterior surface of the patient interface due to irregularities of the posterior surface of the patient interface, and to generate an output signal to adjust the scanning subsystem in order to compensate for defects in laser beam position caused by the posterior surface irregularities of the patient interface.