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.

Blue light is a high-energy light that the eyes absorb from computers, smartphones, LED lights, and fluorescent lights. The sun is the biggest source of blue light. On a sunny day, it's 100,000 times ...

ABC News' Dr. Darien Sutton explains how blue light impacts your performance and overall well-being. Did Aaron Rodgers just finish his NFL career with pick 6? He explained how he'll make retirement ...