Overcorrection makes an eye that was
nearsighted before surgery
farsighted (hyperopia) after surgery. Overcorrection
speeds up the start of
presbyopia. Most people who have overcorrection will
need reading glasses around age 40. Improvements in
surgical techniques are reducing the risk of overcorrection.
Surgery to correct overcorrection is possible. But it is hard to predict
how well it will work.
Pterygium (pronounced tur-IJ-ee-um) is a common eye condition that affects people who spend a lot of time outdoors. People with pterygium have a growth of pink, fleshy tissue on the white of the eye. It usually forms on the side closest to the nose.
Pterygium is also known as surfer's eye because it often affects surfers.
It is a noncancerous lesion that usually grows slowly throughout life. Or it may stop growing after a certain point. In rare cases a pterygium can continue growing until it covers...
With radial keratotomy (RK) surgery, the
number of people who are overcorrected or farsighted seems to increase as more
time (years) passes after the procedure. These changes over time are believed
to be caused by the
hyperopic shift. The hyperopic shift is less common in
people who have had laser surgery.
Primary Medical Reviewer
Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer
Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology
June 24, 2011
WebMD Medical Reference from Healthwise
June 24, 2011
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