Blue light refers to a portion of the light wavelength that can be seen by human eyes and that is considered to be potentially tiring at the retinal level when exposed to it on a regular basis.
This blue-violet light can be typically found within the 380-500 nm wavelength, and is naturally emitted by the sun, and artificially emitted by digital screens. It is however, between the 415 nm to 455 nm where it is considered to be strongest.
Blue light surrounds us in our everyday life. Did you know that the reason we see the sky as being blue is actually because of this type of light? When these shortwaves from the sun strike against air molecules, it creates what our eyes interpret as an infinite blue sky.
Blue light is also responsible for regulating the circadian rhythms of our bodies: the sleep/wake cycles. That’s why, when overexposed to blue light, especially at night, sleep routines can be seriously affected, and computer vision syndrome symptoms might appear.