LASIK is a type of laser-guided eye surgery meant to minimize or repair issues with eyesight. The surgery is carried out by ophthalmologists, who are medical physicians specializing in eye disorders and diseases. LASIK is generally preferable to photorefractive keratectomy (PRK), as it is less painful and requires less time to heal completely. Prior to LASIK eye surgery, the patient's corneas are analyzed with a computer driven sophisticated scanning device and the cornea is mapped out. This stage of the process also detects astigmatism as well as additional peculiarities in the shape of the cornea. The eye surgeon uses this data to determine the amount and location of corneal material to be eliminated during the operation. The surgery is carried out while the person is awake and functional, nonetheless, the patient is generally given a minor sedative and anesthetizing drops in the eyes. The surgeon operates the laser machines, which do all of the incisions. A flap is cut in the cornea, which is the clear front part of the eye, using a laser or blade. Later, an excimer laser is used to remodel the cornea. The laser vaporizes tissue without creating damage. Although usually uncommon, complications can occur with LASIK or any method of eye surgeries. Just some of the more frequently reported complications of LASIK can include: infection, light sensitive or dry eyes, over or under correction, changes in vision, halos or starbursts around lights, double vision, and troubles with the flap produced during the surgical procedure. Although LASIK technology is improving rapidly, studies have not ascertained long-term or permanent complications. The surgery is irreversible.

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