had it done 3 years ago, corrected stigmatism. Now have 15/20 - what most people see at 15 feet, I see from 20. The procedure was quick and painless, most discomfort was putting on the thing that holds your eyes open. minimum 3 days to recover as the cover grows back over your eye (they burn it off to do correction - but don't warn you about the smell until the last minute). They revoke your licensce for minimum 3 days. After procedure I walked out of the room, though world very blurry. Feels kind of gritty as eye heals, and of course no rubbing. VERY light sensitive - spent 3 days in a blackened room with no TV or other lights. Sunglasses a must. They provide a mild pain killer and also drops to keep eyes lubricated and help assist healing.No negative effects on day or night vision, best $3000 I ever spent. Of couse with everything your result may differ. Do your research and be sure you are comfortable with the risk / reward. Good luck.