Blue-ray exists everywhere today

Blue-ray will cause diffusion and flickering in the vision The shorter the wavelength, 
the more energy light waves, which are more likely to cause eye fatigue.
Blue light, which is next to ultraviolet light on the electromagnetic spectrum,
has a shorter wavelength than other visible light. Besides,
it also tends to be diffused. Therefore, it is considered to be the cause of visual flicker.

General computer spectroscopic map

The shorter the wavelength, the more energy light waves,
which are more likely to cause eye fatigue. Blue light,
which is next to ultraviolet light on the electromagnetic spectrum,
has a shorter wavelength than other visible light. Besides,
it also tends to be diffused. Therefore, it is considered to be the cause of visual flicker.

How much blu-ray does the phone screen produce?

Mobile phones have become everyone can not leave the electronic products,
many people like to go to bed before turning off the lights to play with mobile phones,
it seems that this is more feeling. Brushing our phones in the dark can ruin our eyes in minutes,
and the culprit is the invisible short-wave blue light.

Iphone 11 screen spectrogram

See that? In the spectral image of the phone screen,
with wavelengths between 380-500nm, blue light has a distinct peak,
which is the short-wave blue light that hurts our eyes the most.
Brushing your phone in the dark often feels sour eyes, and it's thanks to it,
and prolonged blue light damage is likely to cause irreversible damage to our vision health.