DIMENSIONAL COMPENSATOR FOR USE WITH A PATIENT INTERFACE

摘要

An apparatus and method are provided for performing ocular laser surgery using a patient interface having a posterior contact surface that may include surface irregularities that were generated during manufacturing of the patient interface. A beam delivery system having a focusing lens, scanning subsystem and adaptive optic (e.g. deformable mirror) is provided for guiding the surgical laser beam through the patient interface and to a desired focal spot location. An optical detector generates image data representing the posterior patient interface surface which is then processed by a computer system to identify surface irregularities by comparing the image data to a reference surface or axis. In particular, a surface irregularity can be identified as having a z-axis component; a tilt component and a surface profile component. Each irregularity component can be compensated separately by sending an adjustment signal to one of the beam delivery system components.

主权项

1. An apparatus for directing a surgical laser beam to tissue in a treatment area of an eye during ocular surgery, the apparatus comprising:
a patient interface having a posterior surface and anterior 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 receiving 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 and calculate a patient interface tilt due to irregularities of the posterior surface of the patient interface, the computer subsystem outputting a signal proportional to said tilt to adjust the scanning subsystem and compensate for the posterior surface irregularity.