Treatment is observation if mild and, for more severe cases, surgically lifting the flap, removing the cells, and replacing the flap. This is an inflammatory reaction in the interface, underneath the flap, which typically occurs one to three days postop. It can cause blurring, redness, and discomfort. It is NOT an infection. Cause is unknown, and treatment is with frequent use of steroid eyedrops.
Most cases resolve without incident.
Severe cases, which are even more rare, can cause corneal scarring. This is an irregularity in the curvature of the cornea which can cause blurriness. This blurring can NOT be corrected with glasses, or with current laser technology. The blurring is usually, but not always, subtle. The irregularities in curvature are microscopic, and can occur even in perfectly executed surgery.