Theoretically yes, it is possible for a LASIK flap to be displaced even some years after the operation. However, it takes quite some force that is directed close to the edge of the flap for that to happen, and is very rare.
The important thing is to know how a LASIK flap displacement feels like, so that you can either relax and have some peace of mind, or on the hand know whether to go and see the doctor urgently.
If the LASIK flap is displaced, there will usually be blurring of vision that persists beyond a few minutes. There is also often a sudden sharp pain, and then ongoing discomfort with blinking.
If the eye is poked, and then vision gets blurred immediately together with pain and persistent irritation, it is best to see a LASIK surgeon within the same day.
On the other hand, if vision is as clear as ever and the eye feels comfortable, it is most likely OK. Still, it is worth going to check it out if there are any concerns.
