LASIK is a form of laser surgery to the eye designed to correct or lessen disorders with vision. LASIK is performed by ophthalmologists, who are physicians specializing in disorders of the eye. LASIK is typically preferable to photorefractive keratectomy, or PRK, as it is not as painful and requires less time for healing. Prior to LASIK eye surgery, the patient's corneas are examined with a computer driven scanner and it makes a map of the cornea. This procedure also picks up astigmatism & other irregularities in the cornea's shape. The operating surgeon uses this information to compute the amount and location of corneal tissue to be removed during the surgery. The surgery is performed while the person is awake and functional, still, the patient is usually given a modest sedating drug and anesthetic eye drops. The surgeon operates the lasers, which produce all of the cutting. A flap is cut in the cornea using a blade or laser. Subsequently, an excimer laser remodels the cornea. The laser vaporizes tissue without inducing damage. Although usually uncommon, some complications can occur with LASIK or non laser forms of eye surgeries. Some of the more typically reported complications of LASIK include: infection, light sensitive or dry eyes, under or over correction, changing vision, starbursts or halos around lights, doubled vision, and issues with the flap that was made during the surgical procedure. Although LASIK technology is improving rapidly, clinical studies have not determined long-term complicating problems. The procedure is irreversible.

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