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Nearsightedness: Overcorrection After Surgery - Topic Overview

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.

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Macular dystrophy is a rare, genetic eye disorder that causes vision loss. Macular dystrophy affects the retina in the back of the eye. Specifically, it leads to damage of cells in an area in the retina called the macula. The macula is responsible for central vision. When the macula is damaged, people have difficulty seeing straight ahead. This makes it difficult to read, drive, or perform other daily activities that require fine, central vision. In macular dystrophy, a pigment builds up in cells...

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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.

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WebMD Medical Reference from Healthwise

Last Updated: June 24, 2011
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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