The symptom of headache can be relieved with green light

Migraine patients have such an experience: when seeing light, the symptoms will increase; however, once seeing green landscape, the symptoms usually ease up. White, blue, red and amber light all will exacerbate migraine, but low-intensity green light seems to play a role in mitigation. The team hopes to make special sunglasses to filter all light except green light to help migraine sufferers.

Many migraine sufferers are very sensitive to light. Such reaction is thought to be related with brain structure. In the hypothalamus part of the brain, retinal nerve passing through the sensory information interleaved with other perceived pain neurons. Therefore, light will aggravate the pain of migraines, and pain will lead to visual impairment, said Rami Burstein at Harvard. But not all light have the same optical effect.

A new study, Burstein and his colleagues have migraine but let sighted volunteers stay in a dark room, and gradually enhance the white, blue, green, amber and red light intensity, while record Volunteers light headache who influence the process described herein. Burstein's team used tiny electrodes placed on the eyelids recorded neurons transmit signals from the eye to the brain activity. They also measured by electrodes placed on the head of the volunteers' brain activity. Surprisingly, low-intensity green does not exacerbate migraine, but it reduces the pain of volunteers. "I am thinking in this regard still deep, but I did not think why the green light help alleviate migraine headaches."

Volunteers from the brain and eyes, records show that in terms of the other colors of light compared to green light produced less electrical activity in the brain and eyes. The electrodes were inserted into the rat brain mound; the electrodes show a green light to trigger the minimum amount of current activities.

"Any methods that can help alleviate the suffering of patients with migraine are useful. And it also means that at least green wavelengths of light is not like other lights, because headache is caused by photophobia," said Simon at New York University who didn't participate in the study, "This also explains why some wavelength lights are much easier to cause migraine than other wavelength of lights." Burstein hopes that green light or sunglasses which only spread the green light can help migraine sufferers.

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