Read Full Article here… lifehacker.com

Photo: myboys.me (Shutterstock) The rise of screen use has raised a number of concerns, especially when it comes to eye health and the impacts of blue light on the eye. But what is blue light, and how much is it really to blame for the strain our daily screen activity is putting on our eyes? What is blue light? Blue light is just one wavelength of the visible light spectrum, which includes red, orange, yellow, green, blue, indigo, and violet. There are plenty of wavelengths that exist beyond what we can see with the naked eye, but those in the rainbow—including blue—are visible without any assistance. You don’t just get blue light from the screens in your life; blue light exists in all white light, which means you get plenty of it from the sun you’re exposed to every day, too. Is blue light worrisome? While it is true that under certain laboratory conditions, blue light damages samples of retinal cells , that’s only in a lab. It’s vastly different from how your retinal cells might interact with the same light waves outside of those conditions. Blue light can negatively impact your circadian rhythms—but so can other wavelengths in the light spectrum. Light, in general, helps trick your brain into thinking the sun is still up, so it doesn’t start producing melatonin (the sleep hormone) until much later. Eye strain, on the other hand, is very real and can happen as a direct result of spending too much time […]