Green light for migraine treatment

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Bright lights usually make migraine headaches worse, but a particular type of light may have the opposite effect.
 
Researchers at Beth Israel Deaconess Medical Center  in Boston  recruited migraine patients for a study. Participants were shown four colors, blue, red, amber and green, when they had a migraine and when they didn’t.
 
Blue and red light made the headaches worse but green light reduced them by 20 percent. Researchers discovered that blue and red lights generated the largest signals in the eye and brain. Green light generated the smallest.
 
They’re now developing a  light bulb and sunglasses that can filter out all colors except for green, to see if they  help relieve migraine headaches.
 

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