"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The skincare industry’s current mantra du jour? “Let there be light.” At the simplest level, different ...

Blue light usually comes from the sun but also from digital screens and LED lights. Some experts believe artificial sources may be causing eye damage in humans, but animal studies are inconclusive.

Blue light is all around you. These high-energy light waves emanate from the sun, stream through earth’s atmosphere, and interact with light sensors in your skin and eyes. Increasingly, people are ...