A foreign body sensation after Lasik is not common, but it is a known anomaly. It is very, very
rare for it to be permanent.
Your eye has just had microsurgery and is healing. The nerves that run throughout the cornea have been severed and lasered. You can expect a few of those nerves are going to be angry. It is possible that the epithelium
is disrupted, which often causes the feeling you describe and may not show up upon examination. Fortunately, corneal epithelial cells are the fastest reproducing cells in the human body. Even then, it may take 3-6 weeks for everything to settle down.
It is also possible that the medications required after Lasik are causing an allergic reaction that translates into a foreign body sensation. Don't stop your meds, but discuss with your doctor if a change may be appropriate.
The most common reason for this kind of discomfort is Lasik induced temporary dry eye
. It can affect one eye more than the other and can present as a foreign body sensation. Check our article on Lasik dry eye treatments
Lasik applies the laser energy under a flap of corneal tissue to "fool" the eye into not knowing it has had surgery and thereby reduce these kinds of sensations. It may be that your eye is not so easily fooled.