Patent ID: 7261415

Claim:
A laser surgery system for treatment of an eye having an iris with an iris pattern between a pupil and an outer iris boundary, the system comprising: a computer processor configured to receive a first image of the eye from an imaging assembly of a measurement system, and an associated ablation pattern for the eye, the processor including: an eye tracker that tracks a position of the eye under an optical axis of a laser beam; and a torsional tracker that tracks a torsional orientation of the eye; and an imaging device for obtaining a second image of the eye while the eye is positioned for treatment with the laser beam, the second imaging device coupled to the torsional tracker; wherein the computer processor is configured to: register the ablation pattern with the eye by determining a translation between the first image of the eye and the second image of the eye with reference to the outer iris boundary of the eye, and by determining a torsional rotation between the first image of the eye and the second image of the eye with reference to the iris pattern of the eye; and adjust a delivery of the ablation pattern based on a change of position and/or torsional orientation of the eye during treatment of the eye with the laser beam.