• Variable Spot Scanning (VSS): Variable beam sizes from as small as 0.65 mm up to 6.5 mm scanned over the treatment area, conserving tissue and optimizing treatment times
• Variable Repetition Rate (VRR): VRR delivers treatment at varying repetition rates, optimizing treatment time
• ActiveTrak 3-D Active Eye Tracking: Captures all 3 dimensions of intra-operative eye movements—no dilation required
• ActiveTrak Automatic Centering: Locates, and then automatically sets the treatment center of the pupil.

Learn more about the VISX STAR S4 Excimer Laser System.