The Excimer Laser

By Aprile Small

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.

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.

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.

Photos Courtesy of:

Tyson, Jeff. “How Lasik Works.” 14 June 2005

http://health.howstuffworks.com/lasik4.htm