The first step in laser vision correction is the creation of a WavePrint™ Map of the eye.
 Essentially a fingerprint of your vision, the WavePrint™ Map is derived from a precise and
 individualized measurement. During the diagnostic phase, the WaveScan WaveFront™ System
 creates this detailed map of each patient's eye, and this WavePrint™ Map is then used during
 the treatment phase to perform the vision correction.

 The WaveScan WaveFront™ System, featuring Fourier algorithms, is an FDA-approved
 advancement in wavefront technology that delivers the highest available resolution of your
 wavefront correction. WaveScan™ technology - originally developed for use in high-powered
 telescopes to reduce distortions when viewing distant objects in space - has now been applied
 to laser vision correction, to identify unique imperfections in the eye. In fact, WaveScan™-based
 digital technology identifies and measures imperfections in a patient's eye 25 times more precisely
 than standard methods used for glasses and contact lenses. Physicians transfer this information
 (the WavePrint™ Map) to the laser to treat individuals with the Advanced CustomVue™
 procedure.

 This new level of precision provided by the WaveScan WaveFront™ System with Fourier
 algorithms overcomes the limitations of previous technology, delivering unprecedented resolution
 to ensure the most effective individualized advanced laser treatment available today:
 Advanced CustomVue™ *

 * Market Scope. 2006 Annual Refractive Surgeon Survey