Gee, VISX, lots of people have pupils larger than 6mm, and with your maximum optical zone (the zone that can be programmed into the laser) restricted at 6.5mm by the FDA (STILL smaller than many patients' pupils) it is inevitable that your company is out there ruining a great deal of vision.
Don't you have anyone competent on your staff? A doctor somewhere? A vision scientist somewhere... who understands the relationship between the inevitable induced higher order aberrations, pupil size, and bad vision? Someone needs to stop the carnage of VISX.
Professional Use Information
VISX STAR S4 TM Excimer Laser System and
WaveScan WaveFront? System
http://www.fda.gov/cdrh/pdf/P930016s016c.pdf
The system is for the reduction or elimination of myopic astigmatism up to -6.00 D MRSE, with cylinder between 0.00 and -3.00 D.
The WaveScan e sensor measures the higher order aberrations only over the diameter of the patient's pupil, to a maximum of 6.0 mm. No optical zone diameters other than 6 mm were studied in the U.S. clinical trial.
No higher order aberrations can be measured or treated outside the wavefront measurement region. If the surgeon tries to extend the nominal optical zone beyond the measured wavefront diameter, the nonuniform wavefront transition zone will overlie the attempted spherocylindrical treatment. The safety and effectiveness of setting the nominal optical zone larger than the wavefront measurement area are unknown.
