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PRK
(photorefractive keratectomy) is a procedure that can be used
to help people with mild to moderate myopia with or without
astigmatism. During PRK, a special computer controlled laser
(called an excimer laser) is used to reshape the surface of
the cornea. The procedure itself takes just a few minutes,
and you'll spend about an hour in the doctor's office or surgical
center.
How PRK Reshapes
Your Eye
PRK flattens the center of the cornea with
a laser.
This is how the procedure
is done:
- Your refraction (glasses prescription)
is entered into a computer, which calculates the amount
and pattern of tissue to be removed.
- The laser delivers a programmed
number of pulses of ultraviolet light. Each pulse removes
a microscopic layer of cornea from over the pupil, flattening
the cornea.
When the center of the cornea is
flattened, light rays are focused more directly on the retina
and images are clearer.
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