https://www.photonics.com/a62942/Columbia_Researchers_Focus_on_Blue_Lights Smartphones, tablets and other light-emitting devices are lit by LEDs, which have a peak wavelength in the blue portion of the spectrum. Blue light at night suppresses melatonin and increases alertness; the use of amber-tinted lenses that block blue light mitigates these effects. The Columbia team, led by AriContinue Reading

https://www.photonics.com/a62942/Columbia_Researchers_Focus_on_Blue_Lights Smartphones, tablets and other light-emitting devices are lit by LEDs, which have a peak wavelength in the blue portion of the spectrum. Blue light at night suppresses melatonin and increases alertness; the use of amber-tinted lenses that block blue light mitigates these effects. Using blue light glasses can helpContinue Reading

Smartphones and tablets disrupt sleep, in part, because they emit what’s known as “blue” light. This light is picked up by special cells behind our eyeballs, and it communicates to the brain that it’s morning. (Red light, meanwhile, signals that it’s time to go to sleep). All of this blueContinue Reading