The harm of blue light

1 and blue light can cause black pigmentation for up to 3 months, especially in epidermal granular layer and deeper skin layer. Blue light can inhibit the secretion of melatonin, which is an important hormone affecting sleep. At present, it is known to promote sleep and adjust time difference. Playing electronic products such as mobile phones or tablets that emit blue light before going to bed will lead to poor sleep quality and even insomnia.

2. Blue light and ultraviolet light are the main causes of skin aging. Blue light has a longer wavelength than ultraviolet light and can penetrate deeper into the skin, causing oxidative damage to cell DNA. At present, studies have confirmed that blue light can change the structure of epidermal cells and reduce the production of collagen and elastin.

3. Harmful blue light has extremely high energy and can directly reach the retina through the lens, causing atrophy and even death of retinal pigment epithelial cells. The death of photoreceptor cells will lead to decreased vision or even complete loss. Blue light can also cause macular degeneration. The lens in people's eyes will absorb some blue light and gradually become turbid to form cataracts, while most blue light will penetrate the lens and cannot effectively resist blue light, which is more likely to lead to macular degeneration and cataracts. ?

4. Because of the wavelength of blue light, the focus does not fall in the center of retina, but is a little farther away from 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.

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