Bad news for the screen-addicted ... From the University of Toledo: "We are being exposed to blue light continuously, and the eye's cornea and lens cannot block or reflect it," Dr. Ajith Kuranarathne, assistant professor in the U.T. Dept. of Chemistry and Biochemistry, said. "It's no secret that blue light harms our vision by damaging the eye's retina" ... Macular degeneration, an incurable eye disease that results in significant vision loss starting on average in a person's 50s or 60s, is the death of photoreceptor cells in the retina. Those cells need molecules called retinal to sense light and trigger a cascade of signaling to the brain.
All that fails as a retinal struck with blue light turns into a cell killer. It's hard to believe, but read more here. Get some blue-light blocking glasses and use them!