VISX STAR S4^TM Features

The laser's infrared cameras actively follow the tiniest motions of your eye in all three dimensions, capturing more than 99.4 percent of eye movement. ActiveTrak tracks your natural pupil and doesn't require your eye to be dilated like other laser systems, so you can relax during your treatment-knowing the procedure will be delivered accurately.

Enables your doctor to precisely identify the center of your pupil and keep the laser centered to within 50 microns (about the width of a human hair), even if your eye moves.

Incorporates a sophisticated array of seven beam diameters ranging from 0.65 to 6.5mm to give you a personalized treatment quickly and efficiently. VSS gives your doctor greater flexibility to personalize your laser vision correction with a larger treatment area.

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