Many people use their electronic devices, including phones, tablets, and computers, for extended periods. Companies now sell screen protectors that reportedly block blue light and benefit eye health.

Blue light is a high-energy part of visible light from the sun, screens, and light-emitting diode (LED) bulbs. Your cornea and lens don’t block blue light the way they block ultraviolet (UV) rays.

Dressed in pink from head to toe and surrounded by her many pink possessions, four-year-old Jeeyoo strikes a pose in her Seoul, South Korea, bedroom for a 2007 photograph. Also in Seoul, six-year-old ...

Our smartphones, computer screens, televisions, the fluorescent lights in the office, and the sun all emit blue light. And experts want you to know that yes, exposure to blue light does affect sleep.

Walk into any children's clothing store and you'll see it immediately: the great divide. Blues, greens, reds, and blacks flood the boys' section, while pink and purple dominate the girls' area. But is ...

Not since Monica Lewinsky was a White House intern has one blue dress been the source of so much consternation. (And yes, it's blue.) The fact that a single image could polarize the entire Internet ...