What is Blu ray? How much damage to the eyes? Can the so-called "eye protector" anti blue light glasses really protect your eyes? Recently, the National Health Council has reminded China through the official account of WeChat, China that wearing anti blue glasses is a mistake.
Can anti blue light glasses prevent myopia? Blue light refers to visible light with a wavelength of 400 ~ 500nm, most of which comes from sunlight. Blue light is beneficial and harmful. Harmful blue light is mainly in the band of 400 ~ 445nm, which can penetrate the cornea and lens and directly reach the retina. Long-term irradiation may damage retinal cells. The beneficial blue light is mainly in the 445 ~ 500nm band. Night exposure can inhibit the secretion of pinealoin, that is, melatonin, and regulate the circadian rhythm. Research shows that children can effectively prevent myopia by moving outdoors under natural light every day, but wearing anti blue light glasses can not prevent myopia.
Can anti blue light glasses prevent "blue light harm"? According to China's recommended standard for photobiosafety, the safest level is no danger level (rg0), which requires the radiance to be less than or equal to 100 units, and looks directly at the light source for a long time (> 2.8 hours) at a distance of 2 meters, without blue light hazard. The radiance of most electronic products in life is within 1 unit, so don't worry too much.
The international lighting Commission believes that the white light source used in general lighting, even the light source rich in blue light, will not pose a "blue light hazard" to human eyes. In the first half of 2019, the China Consumer Association purchased 13 representative electronic products in the market for testing. The blue light hazard values of all products are within the safe range, so there is no need to worry too much.
Which people need to wear anti blue light glasses? It is reported that patients with macular disease can consider wearing anti blue light glasses to block harmful blue light and leave beneficial blue light. The specific choice should refer to the latest national anti blue light standard or follow the doctor's advice.