LASIK is a form of laser-guided eye surgery intended to improve disorders with sight. The surgical procedure is performed by ophthalmologists, who are medical physicians who specialize in diseases and disorders of the eye. LASIK is typically preferable to pRK surgery, as it is not as painful and requires less time to recover. Prior to LASIK surgery, the patient's corneas are analyzed with a computer driven scanner and it makes a map of the cornea. This stage of the process also spots astigmatism as well as additional problems in the cornea's shape. The eye surgeon uses this data to judge the amount and location of corneal material to be eliminated during the operation. The surgery is done with the patient awake and alert, nonetheless, the patient is generally given a modest sedating medication and anesthetic drops for the eyes. The operating surgeon operates the lasers, which make all of the cutting. A flap is sliced in the cornea using a laser or blade. Then an excimer laser is used to remodel the cornea. The laser destroys tissue without causing injury or damage. Although usually uncommon, complicating problems could occur with LASIK or non laser forms of eye surgeries. A few of of the more regularly reported complications of LASIK include: infection, dry or light sensitive eyes, under or over correction, changing vision, halos or starbursts around lights, double vision, and problems with the flap made during the surgical procedure. Although LASIK technology is improving quickly, clinical studies have not completely determined long-term or permanent complications. The eye surgery is irreversible.

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