Laser eye surgery is a medical procedure consisting of the use of laser for reshaping the surface of the cornea. It is used to improve shortsightedness, long sightedness or astigmatism. The first information on laser eye surgery dates back from over twenty years ago, and the FDA approved excimer laser eye surgery in 1995.
During laser eye surgery, an excimer laser, controlled by a computer is used to remove tiny amounts of corneal tissue. The aim of the procedure is to restore normal vision, eliminating the need for glasses or contacts. Although laser surgery has risen in popularity in the past few years, only about 20% of ophthalmologists have been trained to use it.
In one type of laser eye surgery, the outer layer of the cornea, also called epithelium, is removed and an excimer laser is used to reshape underneath tissue. This procedure is called photorefractive keratectomy (PRK).
In a newer procedure, a microkeratome is used to cut a flap in the corneal tissue, which is then lifted and an excimer laser is used to reshape underlying tissue. In the end, the flap is put back to its place. This type of laser eye surgery is called laser-assisted in situ...
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