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 400-450 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.
Professor Li Chad Fink, a German ophthalmologist, pointed out that when "inappropriate light" continuously irradiates our eyes, it will also lead to physical dysfunction.
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1, eye injury: harmful blue light is extremely high in energy, which can penetrate the lens directly to the retina, causing retinal pigment epithelial cells to atrophy or even die.
The death of photoreceptor cells will lead to vision loss or even complete loss, which is irreversible. Blue light can also cause macular degeneration. The lens in people's eyes will absorb some blue light, which will gradually become turbid and form cataracts, while most of the blue light will penetrate the lens, especially the lens in children is clear and cannot effectively resist blue light, which is more likely to lead to macular degeneration and cataracts.
2. Visual fatigue: Due to the short wavelength of blue light, the focus is not at the center of the retina, but a little farther away from the retina. If you want to see clearly, your eyes will be in a state of tension for a long time, causing visual fatigue. Long-term visual fatigue may lead to people's myopia deepening, diplopia, easy serial reading, inability to concentrate and other symptoms, affecting people's learning and work efficiency.