Did you know that blue light has both advantages AND disadvantages? I know! We seem to always hear about how bad it is, but it has some benefits, too. And, it’s everywhere. It’s not just being emitted from electronic devices with screens. Actually, the sun is our main source of blue light. Our devices emit only a fraction of what the sum emits, but we spend much more time with our devices and we are in much closer proximity to them than the sun. That is why the blue light from devices has become such a problem. And that is why they are potentially such a danger to our eyes and our vision.