Whether to prevent blue light or not, the first thing to understand is where blue light comes from. Starting from the solar spectrum taught in physics, only a small segment (0.38um --0.72um) of the sun's entire spectrum is visible light, commonly known as "seven-color light". The parts at both ends are invisible light, with shorter wavelengths becoming ultraviolet and longer wavelengths becoming infrared.

It's difficult to decide whether to wear blue light glasses or not, with different opinions. Healthy eye habits do not require wearing blue light-resistant glasses;

Work requires long-term attention to the screen, and qualified anti-blue light glasses can alleviate visual fatigue.

Short-wave blue light has extremely high energy, which can cause free radicals to be produced in the retina, leading to the decay of retinal pigment epithelial cells, damage to photosensitive cells, and irreversible visual impairment. Blue light with a peak wavelength of 460-500 nm was used in the experiment, the irradiation intensity was 1500lx (lux, light intensity unit), and the irradiation time was 3 hours. The results showed that this situation would cause the decline of retinal cell vitality and apoptosis.

When it comes to damage, it is irresponsible to talk about it without considering the dosage. Only when the light is intense, the blue light is abundant, and the exposure time is long, can irreversible damage being caused to the eyes.