Every time we are looking a monitor for hours, whether it is a computer, TV or phone, we are exposed to blue light. The discomfort that is caused is the so-called visual fatigue. Most of us blink less when we are looking at the screens causing an eye strain and eye dryness. Although we often associate blue light with computers and telephones, Sunlight is the main source of blue light.Being outdoors during daylight is where we get most of our exposure to it.Blue light has both benefits and risks.