Patent ID: 9560965
Date: 2017-02-07
CPC Classifications: A61B,G06T

Claim:
1. An eye surgical apparatus comprising: imaging optics for generating observation images of a patient eye; and, a device for determining and displaying an azimuthal orientation of the patient eye with respect to a reference fixed with respect to the patient eye; said device including: a visual display unit configured to simultaneously display: an input interface configured to permit an observer to effect a linear movement of the first rectangular image strip representing the first annular image segment of the captured observation image of the patient eye relative to the second rectangular image strip representing the second annular image segment of the reference image whereby an azimuthal orientation of said captured observation image relative to said reference image changes during said linear movement; a measuring system configured to determine a change of azimuthal orientation of the captured observation image relative to said reference image because of said linear movement; a computer unit having a computer program for computing the center of a first circular structure of a limbus and/or of an iris of said captured observation image and for computing the center of a second circular structure of the limbus and/or of the iris of said reference image; and, said visual display unit being further configured to display said pixels of said captured observation image with polar coordinates having a center coincident with the computed center of said first circular structure and to display said pixels of said reference image with polar coordinates in a polar coordinate system having a center coincident with the computed center of said second circular structure.