The damage of blue light to the eyes includes causing visual fatigue, affecting the rest of the eyes and damaging the tissue structure of the eyes, 1. Causing visual fatigue: Because the wavelength of blue light is short, the focus point does not fall in the center of the retina, but in the position in front of the center of the retina, the eyeballs need to be adjusted accordingly in order to see things clearly, so the eyes are in a long time in a tense state, thus causing visual fatigue. 2. Affect the rest of the eyes: melatonin is an important hormone to promote sleep, and blue light will inhibit the secretion of melatonin, making it difficult to fall asleep, thus affecting the rest of the eyes and causing a decline in the quality of sleep. 3. Damage to the tissue structure of the eyes: blue light has a very high energy, can penetrate the lens directly to the retina, if the eyes are directly exposed to blue light for a long time, it is easy to cause retinal pigment epithelial cell atrophy or even death. Therefore, blue light on the eyes of the damage is still relatively large. Blue light exists in large quantities in computer monitors, cell phones, digital products, LED and other light. In daily life, we should avoid prolonged exposure to blue light and rationalize the time of eye use.