Since most of my outdoor activities like skiing, mountain biking and flying are more dependent on far vision, I elected to correct my distant vision and wear near-vision glasses that I have to do anyway. The biggest difference is that before the surgery, I could get by with reading books and viewing an aircraft's instrument panel without any glasses. But after the procedure, I required close-vision correction for both. There are about 50 people who work in the Laser Eye Center including eight techs, two eye doctors and two operating eye docs. There are many kinds of surgical eye correction.
Technicians do most of the preliminary evaluations.
Halos are directly related to the size of the patient's pupils and their risk increases with pupil size. For example, the likelihood of halos occurring is due to the type of laser being used, since older ones suffer from limitations on how large a circle of correction can be made on the cornea. The larger the pupil, the more chance for a halo due to light entering outside of the correction area. The larger the area the laser can shape, the better. 6.0 or 6.5 mm in diameter while the newer, better equipment ablates 7.5 mm or larger areas.