Blue light is a visible ray (380nm~500nm), which is very powerful to the retina of human eyes. Research has shown that the blue light mainly emanates from the light of LED lamps, mobile phone, tablet, computer, TV, games, LCD screen
Harms of blue light:
Blue light contributes about 90% of the risk of photochemical retinal damage from fluorescent lamps and sunlight, which is why the term "blue light hazard" is used to describe this risk. When blue light is absorbed by retinal tissue it induces oxidative stress and the causes the formation of indigestible debris which accumulates in the outer retina. The cumulative effect of chronic, sub-lethal oxidative retinal stress and the accumulation of oxidative debris in the outer retina contributes to the development of AMD.