any activity after LASIK that can result in your eye getting hit by something puts you at risk of having the LASIK flap that's been cut come back up. every high-volume refractive surgeon (defined as performing 1,000 cases or more every year) has seen SEVERAL patients who had LASIK who got hit in the eye with a ball, or a finger playing basketball, or falling down and the FLAP COMES BACK UP. sometimes, the flap is actually torn off. often, it can be sewn back in place, but usually this results in some fine wrinkles in the flap called striae, which often cause diplopia, or double vision. rarely, you can't find the flap, as it winds up on the playground or whatever, so you're missing a part of your eyeball forever, which does not exactly enable you to see a normal 20/20 afterwards
what the average person doesn't realize is that the LASIK flap NEVER FULLY HEALS and can be VERY EASILY DISLODGED FOR YEARS AFTERWARDS. that's why a surgeon can enhance a LASIK years afterwards simply by lifting the flap back up and lasering the bed and putting the flap back down--because the flap never seals down fully!
this is why i switched my entire practice to LASEK a few years ago, because there isno flap at all in the first place. this is why i have boxers, wrestlers, mixed martial arts professionals, and military special forces patients in my office every week--because they cannot afford the risk of trauma to the eye and having the flap come up, so they can only get the safer non-cutting LASEK. So, to answer your question, it is never fully safe to engage in ANY CONTACT SPORTS after LASIK, but it is 100% safe after the noncutting LASEK and epiLASEK procedures (we recommend 1 week after for sports and 2 weeks after for contact sports, including getting hit in the head with someone else's elbow in a metal cage, which apparently is what the professional mixed martial arts guy i did LASEK on last week does for a living!);)
Emil Chynn, MD, FACS, MBA