As the baby-boomers age, blindness from age-related macular degeneration is on the rise. More than 3 million more people will become victims in the next five years. Eating right can lower your risk.

Age-related macular degeneration (AMD) is the leading cause of vision loss among people 50 and older. It affects more than 1.75 million people in the U.S. and is expected to strike as many as 3 million in the next five years.

The macula is the small spot near the center of the retina. The eye needs it for central vision to see objects straight ahead. When the macula becomes damaged, it severely limits your ability to see things in your central line of vision.

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Red light cures acne. Amber light, sleep disorders. And don’t even get us started on violet light—studies suggest that lights on the far end of the visible spectrum may even help treat certain cancers. Welcome to the new, exciting (and occasionally dubious) world of light therapy, where bathing yourself in various hues of visible light can combat disease and forestall the effects of aging.

For years, scientists have argued that, when it comes to managing pain and treating skin conditions, a little light may help. And now a new study in the journal Brain presents strong evidence that a narrow band of green light can make migraines more manageable.

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