Six minutes of red light a day slows the development of short-sightedness in children.
Eight to 13-year-olds who wore glasses for short-sightedness were exposed to a few minutes of red light from a desk lamp twice a day for a year, with a control group. Short-sightedness progressed at a third of the speed in the red light group, the journal Ophthalmology reports.
In myopia, or short-sightedness, the eyeball grows too long, making distant objects blurry.
One theory is red light increases blood flow to the eye which influences its growth in some way.
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