The Wavelight Allegretto EYEQ400 is the fastest EXCIMER laser available in the United States. The Allegretto works at 400 laser bursts per second, taking less than TWO seconds of treatment to correct one diopter of nearsightedness. For other lasers, it would take 2-3 times longer to treat the same prescription. Less time under the laser means less stress and discomfort for you. It also means more precise and accurate treatment, with better and more predictble visual results than other platforms.
We have tabulated for you the results of the published FDA studies, comparing various laser platforms.
FDA Results for Myopia LASIK, approved range from -12 D Sph. to -6 D Cyl.
FDA Results for Hyperopia LASIK, approved range from +6 D Sph. to +6 D Cyl.
Perfect Pulse Technology
The Allegretto laser uses PerfectPulse Technology® . PerfectPulse Technology uses advanced high-speed eye-tracking to follow the eye's movements and to ensure accurate placement of each laser pulse on the cornea. Should the eye ever move out of range, the eye tracker will pause the treatment until it is back on track. PerfectPulse Technology represents a new approach to laser vision correction. Smart energy control measures and adjusts energy levels in the laser pulse from creation to application. High-speed eye tracking charts the eye's movement at 400 times per second. As a result, every laser pulse is completely controlled and precise, achieving the most customized and accurate level of correction possible.
Eye Tracking Technology
The remarkable speed of the flying spot laser of the WAVELIGHT ALLEGRETTO means the direction of the beam needs to be constantly and minutely adjusted to the position of the eye. Every 2-3 milliseconds, the eye's location is measured and the internal mirrors of the WAVELIGHT ALLEGRETTO are automatically realigned. There is lots of redundancy built in to the system. Right before the pulse is released, a second check is made to confirm that the eye has not moved. This happens 400 times every second, once for every laser pulse. If, at any time, the eye moves too quickly to be measured or moves out of range, the laser will stop and wait for the eye to move back into position.
Large Optical Zones
WAVELIGHT ALLEGRETTO is capable of producing some of the largest available optical zones. The optical zone refers to the portion of the cornea that has been corrected by the laser. A larger optical zone is especially important for night vision, and for patients with very large pupils. If a patient's pupil is larger than the optical zone, they may experience poor peripheral vision, poor night vision, and a higher than normal incidence of halos and glare. In the past, this has been one of the biggest drawbacks to conventional laser correction surgery. Wavefront-Optimized technology built into WAVELIGHT ALLEGRETTO addresses this limitation.
Better Night Vision and Glare Control
At night and in dark conditions, the pupil becomes larger to permit the maximum amount of light to enter the eye. Laser eye correction needs to take this fact into account. If the optical zone is smaller than the size of the pupil at its largest, there is a good chance that the patient will experience poor night vision or problems with glare and halos around bright objects such as oncoming headlights. Wavelight Allegretto Eye-Q 400 is able to produce a larger optical zone, virtually eliminating glare and night vision problems associated with older generation lasers.
When it was approved in 2003 as the first new laser in five years, the FDA granted WAVELIGHT ALLEGRETTO the widest approval range ever initially given to a new laser for both myopic and hyperopic vision correction. For a summary of FDA indications click here.