Harmful performance of blue light
1. Eye injury: Harmful blue light has extremely high energy and can penetrate the lens directly to the retina, causing the atrophy or even death of retinal pigment epithelial cells. The death of light-sensitive cells will result in decreased vision or even complete loss of vision. This damage is irreversible. Blue light can also cause macular degeneration. The lens of the human eye will absorb part of the blue light and gradually become cloudy to form cataracts, and most of the blue light will penetrate the lens, especially children’s lenses are clearer and cannot effectively resist the blue light, which is more likely to cause macular degeneration and cataracts.
2. Asthenopia: Due to the short wavelength of blue light, the focus point does not fall on the center of the retina, but a bit farther from the retina. To see clearly, the eyeballs will be in a state of tension for a long time, causing visual fatigue. Long-term visual fatigue may lead to symptoms such as deepening of myopia, double vision, ease of reading when reading, and inability to concentrate, which affects people’s learning and work efficiency.
3. Poor sleep: Blue light can inhibit the secretion of melatonin, which is an important hormone that affects sleep. Its known role is to promote sleep and regulate jet lag. This can also explain why playing with a mobile phone or tablet before going to bed can cause poor sleep quality or even difficulty falling asleep.