There's a lot of product lately that filter blue light and a lot of people ask what is wrong with blue light and why it has to be filtered. It is not a new concept but lately it is becoming of an issue because we are now in an age that computers are very popular and it happens that most of the computer we use has a screen that emits blue light.
The biggest source of blue light is from the sun. We usually see white light coming from the sun but technically it consists of combination of red, orange, yellow, green, and blue light rays. Each of these rays has different wave lengths. The shorter the wave length the stronger the energy it carries and the color blue has the shortest wave length. If we remove the color blue from the white light, you'll notice that the color becomes yellowish, warmer, and more relaxing to the eye. Think of lamps and candles as an example.
The problem with our eyes is that when light comes in, it is not very good at blocking blue light. Excessive absorption of blue light's energy is not healthy because it it can damage the cells of the eye which results to slow blindness and eye strain. Blue light is not that bad, in fact we need it as a natural wake up call in the morning, it boosts alertness, elevates mood, and helps in memory and cognitive functions.