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The Excimer Laser
By Aprile Small
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What is it?
The excimer laser is a computer-controlled ultraviolet beam of light used to correct nearsightedness. Each pulse can cut 39 millionths of an inch of tissue in 12 billionths of a second.
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How is it used?
Before surgery, a map is constructed of the eye. The required changed is then calculated and entered into the computer. A physician cuts a flap of tissue from the cornea. The laser is then used to remove specific areas of tissue from beneath the cornea, improving the patient’s eyesight.
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Success Rate
Studies show a 95% success rate for corrective eyesight surgeries. Only 5% of patients still require glasses for distance, such as when driving.
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Photos Courtesy of:
Tyson, Jeff. “How Lasik Works.” 14 June 2005
http://health.howstuffworks.com/lasik4.htm