LASIK is a type of laser-guided surgery to the eye designed to improve or correct issues with eyesight. The surgical procedure is performed by ophthalmologists, who are physicians or MDs who specialize in eye problems. LASIK is generally preferable to photorefractive keratectomy, or PRK, as it is less painful and requires less time to recover. Before having LASIK surgery, the patient's corneas are evaluated with a computerized sophisticated scanning device and it creates a map of the cornea. This stage of the procedure also discovers astigmatism and also additional problems in the shape of the cornea. The surgeon uses this information to determine the location as well as the amount of corneal material to be eliminated during the operation. The surgery is done while the patient is awake and functional, nonetheless, the patient is often given a mild sedating medication and anesthetizing eye drops. The eye surgeon operates the laser machines, which do all of the incisions. A flap is carved in the cornea using a laser or blade. Afterwards, an excimer laser remodels the cornea. The laser vaporizes tissue without creating damage to the eye. Although usually uncommon, complicating problems can occur with LASIK or any method of eye surgeries. Some of the more commonly reported complications of LASIK are: infection, dry eyes and light sensitive eyes, over or under correction, fluctuating vision, rings around lights, doubled vision, and difficulties with the flap that was produced during the surgery. Although LASIK technology is improving rapidly, studies have not completely determined long-term complicating problems. The procedure cannot be reversed.

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