Most people don’t need LASIK enhancement. Only about 1 to 5 percent of people who undergo LASIK need a touch-up later. You might need LASIK retreatment if your vision isn’t as clear as you’d like after following the aftercare procedure for three months following your initial surgery. You might also need retreatment several years later if you notice that you can’t see as clearly as you could right after surgery. It doesn’t mean the treatment wore off. It’s just that your vision deteriorated over time for other reasons. Age is a likely contributing factor. If you think you’re a candidate for a LASIK touch-up, your doctor will determine if your cornea is thick enough to support an enhancement.