18 years and running. However, LASIK doe not prevent Cataracts. Eye Doc at VA diagnosed me with Cataracts 2 years ago but said no need for surgery-yet. You will probably need reading glasses for iPAD/Laptop, etc. And fine work.
You may also experience "dry eyes." But all in all, it was worth it. Makes hunting/fishing/outdoor sports much easier. No need to constantly wipe glasses. Good luck!