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Laser Technology
VISX STAR S4™ ActiveTrak Excimer Laser System
In the early 1980's, VISX, Inc. developed the first Excimer laser designed to improve the precision and predictability of altering the shape of the cornea over the previous techniques that used incisions. The St. Paul Eye Clinic uses the newest generation VISX STAR S4 ActiveTrak Excimer Laser System that incorporates variable beam technology with an active eye tracking system. The ActiveTrak continuously positions the laser beam precisely on the eye throughout the procedure. It is the only 3D tracker that is capable of tracking all eye movements (side-to-side and up and down) and there is no need to dilate the pupil. This assures accurate placement of the beam helping our patients feel more at ease during treatment and allowing them to appreciate their improved vision much quicker. The VISX STAR S4 variable beam technology provides faster treatment times, a smoother surface and allows the surgeon to shape the beam to meet each patient's individual vision correction need. VISX laser systems have features that translate into several advantages for you: • VISX laser systems produce the smoothest surface on the cornea after the procedure. Smoother ablations, as they're known, promote faster healing and result in better vision. • VISX laser systems allow the doctor to track your eye movement in all three dimensions during the treatment, for greater control. • VISX laser systems achieve an optical zone that may result in reduced problems with night vision • VISX ActiveTrak™ laser systems produce seven variable sized beams, giving the doctor greater flexibility and allowing for a faster, smoother treatment with precise corneal shaping • VISX laser systems require a shorter procedure time, which enhances comfort and may reduce the risk of postoperative complications.
How does it work?
WaveScan Technology Originally developed for use in high-powered telescopes to reduce distortions when viewing distant objects in space, the technology has now been applied to laser vision correction, offering a level of measurement that is 25 times more precise than the standard measurements used to determine your eyewear prescription. The St. Paul Eye Clinic now uses this same technology to offer you the state-of-the-art in laser vision correction, The WaveScan produces a visual representation, or map, of how your eye’s own optical system processes light. This map provides a precise and detailed analysis of your eye’s unique visual characteristics. Much like your own fingerprint, no two eyes are exactly alike. Your surgeon then uses this analysis to create an individualized treatment plan to correct your eyesight for an optimal visual result. The Wave Scan’s digital information is then transferred to the VISX Star S4™ Excimer laser system, providing you with an increased level of precision and accuracy
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The WaveScan system creates a map of the eye, much like a fingerprint, which allows the surgeon to formulate a special treatment plan for each patient. Even though two patients may have the same prescription, their eyes are not the same. The WaveScan’s optics project light into the patient’s eyes, this visual pathway is then analyzed by thousands of tiny mirrors, thus creating a pattern of vision based on how the light was bent. This pattern of vision is your individual WavePrint, fingerprint of your vision. By having this fingerprint of your vision, the surgeon can better determine your candidacy for laser vision correction.
