Overall, green light exposure reduced the number of headache days per month by an average of about 60%. A majority of study participants – 86% of episodic migraine patients and 63% of chronic migraine patients – reported a more than 50% reduction in headache days per month. Episodic migraine is characterized by up to 14 headache days per month, while chronic migraine is 15 or more headache days per month.
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Laurent F Martin, Amol M Patwardhan, Sejal V Jain, Michelle M Salloum, Julia Freeman, Rajesh Khanna, Pooja Gannala, Vasudha Goel, Felesia N Jones-MacFarland, William DS Killgore, Frank Porreca, Mohab M Ibrahim. Evaluation of green light exposure on headache frequency and quality of life in migraine patients: A preliminary one-way cross-over clinical trial. Cephalalgia, 2020; 033310242095671 DOI: 10.1177/0333102420956711