LASIK is a type of laser-guided operation to the eye designed to correct or lessen issues with eyesight. The operation is performed by ophthalmologists, who are physicians specializing in eye disorders and diseases. LASIK is commonly preferable to pRK (photorefractive keratectomy), as it is much less painful and requires less time to recover. Prior to having LASIK surgery, the patient's corneas are examined with a computer controlled scanning device and it creates a map of the cornea. This step of the process also discovers astigmatism and also other deviations in the cornea's shape. The eye surgeon uses this information to judge the amount as well as location of corneal material to be eliminated during the operation. The surgery is performed with the person awake and functional, still, the patient is usually given a minor sedating agent and anesthetic drops in the eyes. The operating surgeon operates the laser machines, which produce all of the cutting. A flap is carved in the cornea, which is the clear front part of the eye, using a blade or laser. Afterwards, an excimer laser remodels the cornea. The laser destroys tissue without causing injury or damage. Although usually uncommon, damaging complications might occur with LASIK or other laser or non laser eye surgeries. Just a few of the more typically reported complications of LASIK are: infection, light sensitive or dry eyes, under or over correction, fluctuating vision, starbursts or halos around lights, double vision, and disorders with the flap produced during the surgery. Although LASIK technology is improving very rapidly, research studies have not completely defined long-term or permanent complications. The surgical procedure is irreversible.

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