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    Nearsightedness: Undercorrection After Surgery - Topic Overview

    Undercorrection occurs when an eye remains somewhat nearsighted after refractive surgery. It is seldom considered a serious complication. Distance vision is better (if not perfect), and near vision is still good. Undercorrection is much more common in people with severe nearsightedness than in people who had nearsightedness of less than 3 diopters.

    Slight undercorrection may be considered an advantage. A little mild nearsightedness will delay the onset of presbyopia. And it may offset the effect of progressive farsightedness (hyperopia). Also, the amount of undercorrection may decrease after several years because of a phenomenon called the hyperopic shift. Hyperopic shift is the gradual increase in farsightedness that may occur for some years after radial keratotomy (RK) surgery.

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    Understanding Styes -- the Basics

    A stye is a pimple or abscess that forms in either the upper or lower eyelid. It is an inflammation caused by blockage of an oil duct and bacteria that normally live on the surface of the eyelid without any problems. Some germs can get trapped along with dead skin cells along the edge of the eyelid. Styes are usually superficial and plainly visible. Occasionally, they can reside deeper within the eyelid. An external stye starts as a pimple next to an eyelash. It turns into a red, painful bump that...

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    Undercorrection may be successfully corrected with a repeat surgery. But repeat operations tend to be less effective and less predictable than the first surgery.

    WebMD Medical Reference from Healthwise

    Last Updated: September 09, 2014
    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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