In order to gain the greatest advantage from wavefront technology it is important to be able to apply the laser treatment very precisely to specific parts of the cornea via iris recognition tracking. Tracking systems have become increasingly sophisticated over the last few years and allow the laser to follow the tiniest eye movements during surgery.
The Abbott – AMO (VISX) STAR S4® Excimer Laser uses ActiveTrak 3-D Active Eye Tracking. This is the first FDA-approved tracking system in the industry to track eye movements along the X, Y and Z axes. Therefore these features improve the accuracy of the procedure and safety for the patient. WaveScan WaveFront data creates a 3D map at the scanning process providing detailed information of the patient’s vision correction requirements.
It is also possible to photograph the unique patterns in the iris, which are as individual as fingerprints. For example, the TPV Z100 laser identifies approximately 3,000 different features of the iris and aligns exactly with these patterns so that the treatment is delivered to precisely the right areas of the cornea. The system operates while the laser is running and even compensates for rotation of the eye (dynamic rotational eye-tracking) – very important when treating astigmatism, for example.