As early as 1966, Nell and others found that blue light irradiation would damage retinal cells, leading to decreased or even loss of vision.

Among them, short-wave blue light with wavelength of 400-480 nm is the most harmful to retina.

At the 20 10 annual meeting of the international optical association, the world's top optical experts unanimously pointed out that short-wave blue light has extremely high energy and can penetrate the lens directly to the retina. Blue light irradiation on retina will produce free radicals, which will lead to the decline of retinal pigment epithelial cells, and the decline of epithelial cells will lead to the lack of nutrients in photoreceptor cells, thus causing visual damage, which is irreversible.

In today's era of rapid development of science and technology, we can't live without digital products such as computers, notebooks and tablets, and we can work, live and play without leaving home. All these are displayed through the internet and computer screens. While improving work efficiency and enjoying entertainment, we should also notice that our eyes are being hurt by blue light.