The VISX STAR S4 IR Excimer Laser system represents the most advanced laser technology platform available today. Integrating data collected by the WaveScan WaveFront System, the STAR S4 IR utilizes VISX Iris Registration and other exclusive VISX technologies to deliver advanced precision and enhanced safety.

Iris Registration (IR):
The first FDA-approved, fully automated, non-contact method of alignment of the correct CustomVue treatment to the corneal site.

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 to the center of the pupil.