All current eye-tracking systems used in refractive surgery basically monitor the center of the pupil but not the corneal surface which is the area being treated. This is a valid assumption for eye translation, but not for eye rotation.
Knowledge of the motion patterns occurring during refractive laser treatment and the structure of applied ablation profiles, it is obvious that all type of motions (rotation and translation) independently influence the clinical outcome if not compensated.
The new SMI 6D Tracking represents the next generation of eye-tracking systems, measuring rotations and translations in all three dimensions: 2*3D=6D. With its unique single camera solution, the SMI 6D Tracking system can measure X, Y, roll and tilt during surgery, removing any concern about fixation loss on the part of the patient.
Ask your laser manufacturer for 6D Eye Tracking – eye tracking in new dimensions and read the CRSToday journal publication to understand more about the clinical relevance.
Experts Comments
Ronald Krueger, MD, Cole Eye Institute, Ohio, USA