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Tomorrow's Technology Here Today
Laser vision correction is only as good as the information used to program the number, location and size of the laser's pulses. Giving the doctor the power to find that information and make it part of a personalized treatment is the main purpose of the WavePrint™ System. The System's highly sophisticated diagnostic measuring device maps the "fingerprint" of your vision so surgeons can determine the precise location and degree of laser treatment.
What Does "Fingerprint of Your Vision" Mean?
Until now, the diagnostic measurements taken prior to laser vision correction have involved primarily the cornea - the clear portion of the eye covering your iris and pupil. The WavePrint System is an important technological advance because it analyzes your entire visual system from cornea to retina - that is, from the front to the back of your eye, even including the tear film that covers your cornea.
How Is That Accomplished?
The WavePrint System begins by projecting light rays into your eye. Those light rays make up what is called a "wavefront" that travels toward the back of the eye, all the while subject to the subtle distortions produced by the eye's various structures.
Using a sensor containing hundreds of microscopic optical lenses, the WavePrint System then measures how much your optical system distorts this wavefront by comparing it with the "virgin" wavefront, which is undistorted before it enters the eye.
These sophisticated measurements produce a pictorial and numerical "fingerprint" of the entire eye's optical distortions, permitting an accurate assessment of your unique visual profile.
This diagnostic information, used in conjunction with other tests such as a standard eye chart reading and corneal topography, allows eye surgeons first of all to determine whether you are a good candidate for laser vision correction; and if so, to personalize your treatment for the best possible result.
WavePrint Data Results in a Custom Procedure
A proprietary VISX software program determines what changes must be made to your eye's corneal surface in order to produce a crisply focused image on the retina. Based on the information captured by the WavePrint System and depicted in your WavePrint map, the eye surgeon can make subtle changes in treatment settings to the VISX STAR S3™ excimer laser, to reshape the corneal curvature with greater precision than has been possible up to now.
Variable Spot Scanning
Other technical features of the WavePrint System also help to improve surgical outcomes. The laser's Variable Spot Scanning feature uses variable-sized beams to treat a larger area of the cornea than in the past, giving surgeons greater flexibility in developing a personalized treatment when pupil size is a concern.
The VISX® laser uses the Variable Spot Scanning technology in creating a blend zone in myopic patients needing more than minus 1.0 diopters of laser vision correction.
3D ActiveTrak™ Eyetracker
The VISX laser also has built-in 3D ActiveTrak eyetracking that follows the tiny motions of your eye instantaneously and automatically in all three dimensions. Keeping the laser focused on the treatment zone is the only way to obtain the best possible visual outcome. The eyetracker repositions the laser to adjust for even the slightest movements and ensure accurate personalized treatment. |
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