I had LASIK surgery performed almost seven years ago. As Kitsune mentioned, your eyes most definitely can go bad again (technical term is "regressing,") and just this year I've had to get a pair of glasses for occasional distance reading--mostly anime subtitles.

The good news is that repeat surgeries, if you want them, are usually included in your original price. It's like a warranty.
BUT, you can't do
too many repeat surgeries because there's only so much cornea they can take off. My prescription was -9.5/-9.75 (take THAT, wolf

) and I hit the minimum thickness (250 micrometers, if you care) with my first procedure. But even if I do have to go back to wearing contacts/glasses full-time someday, I'll never regret doing the LASIK surgery. The difference between my "regressed" eyesight and the legal-blindness I had before is still immense.
I will say this, though: you can smell the burning flesh while the laser's actually going. It's not for the squeamish.