The new VISX S4 laser is the only laser available with a three dimensional tracking device to assisst in controlling ablation centration despite eye movement. The VISX4 laser is approved for treatment of nearsightedness, farsightedness and astigmatism.In addition, the VISX Wavefront treatment has now been approved tor Custom Lasik treatment which may provide even better vision than standard lasik treatments! PRK, LASIK, and LASEK can all be performed on this laser. More procedures have been performed worldwide and in the U.S. on VISX lasers than any other laser available. In fact:
Here?s a breakdown of the laser systems preferred by U.S. refractive surgeons, according to industry newsletter Market Scope:

Visx systems are used in 62.4 percent of procedures

Alcon?s(Autonomous/Ladarvision) in 22.1 percent

Nidek?s in 9.9 percent

Several others account for the remaining 5.6 percent


A whole new dimension in technology and safety by the leaders in laser vision correction.
The ONLY laser vision correction system that offers all these features!

3-D Active Eye Tracking

Variable Sized Beams

ActiveTrak? is the only system that allows the doctor to track your eye movement in all three dimensions during the treatment, for greater control.

Seven variable sized beams give the doctor greater flexibility and allow for faster, smoother treatment with precise corneal shaping.

No Dilation Required

Unlike other systems, with ActiveTrak the doctor does not have to dilate your pupils. This means an even quicker recovery time.

ActiveTrak is made by VISX®, the name that doctors have trusted in over 2 million procedures.

Wavefront and Custom Lasik

The Fingerprint Of Your Vision?

Your vision is unique ­ as personal as your fingerprint or your DNA. The Wave Scan Wavefront System provides your eye doctor with a WavePrint Map.

The WavePrint? Map

Now, for the first time, the WavePrint Map provides information on more than just the corneal surface of your eye. It reveals the way your entire optical system processes light. The WavePrint Map provides a new level of diagnostic information previously unavailable to the doctor.

Using this information, your doctor can:
Accurately assess whether you're a good candidate for laser vision correction. Anyone who is considering laser vision correction should obtain a WavePrint Map as the first step.
Along with the other diagnostic tests that your doctor performs, a personalized treatment plan can then be developed to address your unique vision needs.

The WavePrint Map: From the cosmos to your eye doctor's office

The WavePrint Map is derived from technology first developed to correct distortions of light waves from space. This allowed researchers to accurately view images of stars and planets. The WavePrint Map uses the same technology to measure light waves as they travel through your eye. This technology provides a precise and more detailed analysis of your vision.