no it doesn't!
i think it totally depends on the type you have (Lasik or PRK).
Lasik is quick, easy and pain free
PRK they laser straight into the eye, so longer healing process and have to wear the contacts or glasses afterwards or whatever.
Lasik they laser the top of your eye, so its like a flap and fold it over, then laser your eye, fold the flap back. put on the eye cover things and you walk out of there. sleep with them on, go the next day for your check up and your done.
i wore contacts, my eyes were -3.5 in my left eye and -3.25 in my right. they lasered the same amount resulting in me having 20/20 vision in my left eye and better than 20/20 vision in my right eye. how do you have better vision than 20/20? i dunno!