Yes, it is possible for a Lasik flap to be dislodged or displaced even 10, 15 years after a Lasik op. This is because a cut Lasik flap is not stitched or glued back - the corneal flap only adheres by tissue pressure. Thus, you can say that a Lasik flap never fully heals.
If you have a Lasik flap dislodgement problem, you will immediately experience blurry vision, irritation and/or sharp pain. If that is the case for you, it is best to see a Lasik eye doctor as soon as possible to reposition your Lasik flap and also to prevent flap wrinkles and other flap-related problems from occurring.
:)
Dr Tony Ho