author
usa
Excimer lasers create a cool ultraviolet light beam to remove (“ablate”) microscopic amounts of tissue from the cornea to reshape it so light entering the eye focuses more accurately on the retina for improved vision. For nearsighted people, the goal is to flatten the cornea; with farsighted people, a steeper cornea is desired. Excimer lasers also can correct astigmatism by smoothing an irregular cornea into a more normal shape. After the laser ablation reshapes the cornea, the flap is then lai…
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