LASIK is a type of laser surgery to the eye designed to remedy troubles with sight. LASIK is performed by ophthalmologists, who are medical physicians who specialize in eye disorders and diseases. LASIK is commonly preferable to photorefractive keratectomy (PRK), as it is less painful and requires less time for fulll healing. Prior to having LASIK surgery, the patient's corneas are evaluated with a computerized scanning device and the cornea is mapped out. This procedure also picks up astigmatism or other peculiarities 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 removed during the surgery. The operation is performed with the patient awake and alert, still, the patient is typically given a mild sedating agent and anesthetic eye drops. The surgeon operates the lasers, which create all of the cutting. A flap is carved in the cornea using a blade or a laser. Subsequently, an excimer laser remodels the cornea. The laser destroys tissue without creating injury to the eye. Although usually uncommon, complicating problems might occur with LASIK or any form of eye surgeries. A number of the more frequently reported complications of LASIK can include: infection, light sensitive and dry eyes, under or over correction, fluctuations in vision, rings around lights, doubled vision, and problems with the flap that was made during the surgical procedure. Although LASIK technology is improving very rapidly, scientists have not characterized long-term complicating problems. The surgery cannot be reversed.

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