Scientists think nighttime exposure to blue light throws off your circadian rhythm, or sleep/wake cycle. This could lead to symptoms of depression. That’s because your circadian rhythm plays a ...

(Red light, meanwhile, signals that it's time to go to sleep). This video from Everyday Chemistry has a good explanation of how that works: All of this blue light suppresses melatonin, a hormone ...

A new study concluded that blue light glasses probably have no greater effect on the eyes than non-blue light glasses, contradicting research that says they help with eye strain, sleep quality ...