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Lazy Eye in Children: Less Patch Time OK

Moderate Amblyopia Better in Kids Who Wear Patch Just 2 Hours/Day
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WebMD Health News

May 12, 2003 -- Treatment for lazy eye in children is about to get much easier. A new study shows that wearing an eye patch for only two hours a day works just as well -- and just as fast -- as wearing the patch for six hours.

It's been common wisdom that the more a kid with a lazy eye wears a patch on the good eye, the sooner his or her vision will improve. In this case, less turns out to be just as much.

"Treatment now is going to be dramatically different," study leader Michael Repka, MD, tells WebMD. "It does stand to reason that wearing the patch longer is better. That is why these results are so surprising."

How convincing are the study results? Repka, professor of ophthalmology and pediatrics at the Johns Hopkins, says he's already changed the way he treats his patients. So has Scott Lambert, MD, director of pediatric ophthalmology at Atlanta's Emory Eye Clinic, one of the study's principal investigators.

Lazy eye -- amblyopia -- is the leading cause of vision loss in children. It happens when one eye doesn't see as well as the other. Usually it's because of a crossed or wandering eye (strabismus), or because one eye is much more nearsighted or farsighted than the other.

When this happens to young children, their brain stops processing signals from the weak eye. If allowed to go on long enough, the child permanently loses sight in the weak eye -- even if there's no physical damage to the eye. Fortunately, there's a treatment: Put a patch over the good eye, and force the child's brain to learn to see with the weak eye.

That's a problem for kids. First, wearing the patch means they can only see with their weak eye. This can be frustrating. Second, the eye patch leads to stigma. Other children tend to tease or stare at a kid who has to wear an eye patch.

But what if it took only a couple of hours of patch-wearing a day? Then kids could wait to wear the patch until they got home from school.

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