RISKS AND COMPLICATIONS

According to the FDA, the Food and Drug Administration, between 1% and 5% of patients after LASIK, laser eye surgery experience some side effects or complications. Of these, less than 1 out of hundred are considered serious.
Before your laser eye procedure, your surgeon should explain to you the risks and possible complications, and potential side effects, including the pros and cons of having one or both eyes done on the same day. This is the "informed consent" process.
The following side effects are possible, but usually disappear over time. In rare situations, they may be permanent.
Discomfort or pain
Hazy or blurry vision
Scratchiness
Dryness
Glare
Haloes or starbursts around lights
Light sensitivity
Small pink or red patches on the white of the eye

Other risks and complications include

Over- or under-correction. These problems can often be improved with glasses, contact lenses and     enhancements.
Corneal scarring, irregular astigmatism (permanent warping of the cornea), and an inability to wear     contact lenses.
Corneal infection.
"Loss of best corrected visual acuity" - that is, you would not be able to see as well after surgery, even     with glasses or contacts, as you did with glasses or contacts before surgery.
A decrease in contrast sensitivity, "crispness," or sharpness. That means that even though you may     have 20/20 vision, objects may appear fuzzy or grayish.
Problems with night driving that may require glasses.
Flap problems, including: irregular flaps, incomplete flaps, flaps cut off entirely, and ingrowth of cells     under the flap.

You should discuss with your local surgeon about his personal LASIK surgery statistics and typical results for patients. Laser eye surgery complications, statistics, and results do vary among surgeons. Therefore it is very important to know your doctor’s experience and track record.