Short wave blue light is the light with Bai wavelength between 400 nm and 480 nm with relatively high energy than Du. Blue light within this wavelength will increase the amount of toxin in macular area of eyes, which will seriously threaten our fundus health. At present, the effective solution is to film the TV. Anti blue light film technology has been very mature, low cost, can effectively prevent blue light penetration.
Blue light is not all harmful blue light. What is really harmful is blue light within 400 to 440 nm. However, blue light between 480 and 500 nm can adjust biological rhythm. Sleep, emotion and memory are related to it, which is beneficial to human body. Moreover, whether the short wave blue light does harm to the human eye is related to the irradiation intensity and the irradiation time. When the illumination reaches a certain level and lasts for more than two hours, it is possible to damage the retina.
Why does blue light cause vision loss?
- The death of photosensitive cells will lead to the loss of vision, which is irreversible.
- Harmful blue light with high energy can penetrate the lens and reach the retina, causing the atrophy and even death of retinal pigment epithelial cells.
- Blue light can cause macular lesions. The lens in human eyes can absorb part of the blue light and gradually become turbid to form cataract. Most of the blue light will penetrate the lens, especially in children. The lens is clear and can not effectively resist the blue light, which is more likely to cause macula
- Because of the short wavelength of blue light, the focus is not on the center of the retina, but on a point closer to the retina.