The use of electronic devices such as mobile phones and computers not only brings convenience to people, but also poses health threats. Especially the eyes, they have to undergo tests every day. How to protect your eyes? Protecting eyesight naturally ranks first. When using electronic devices, it is important to protect your eyes by maintaining the correct posture. The distance between the eyes and the computer screen should be at least 30 centimeters. The display should be lowered appropriately, so that both eyes are looking straight or slightly down at the display screen, that is, the line of sight is 10-20 degrees downward. At this point, the muscles of the eyes are in a relatively relaxed state. Adequate lighting. Both too strong and too weak light are not conducive to protecting vision. Long term low illumination use of the eye can cause irreversible degradation of cone cells, leading to decreased vision. If the lighting is too strong, it can cause strong reflections, irritate the eyes, and also cause discomfort. Our country has strict standards for the brightness of light in different indoor environments, and the illuminance for ordinary people when reading and writing should be greater than 300 lux (referring to the unit of light intensity that reflects the luminous flux shining on a unit area). Select a large screen. Priority should be given to electronic devices with large screens. If you can use a computer, you don't need a phone, and if you can use a desktop or laptop, you don't need a tablet. The font should be appropriately large. If the font is too small, it can easily affect the eyes. Pay attention to rest. Pay attention to eye hygiene and do eye exercises regularly. Consciously blink more, with a blinking rate of around 25 times per minute, not less than 15 times. Pay more attention to rest, and rest for 5 minutes every 1 hour of eye use. You can rotate your eyes or look far. Improve the work environment. Indoor ventilation should be frequent to maintain fresh air and increase air humidity. For human health, a reasonable diet is crucial, as is eye protection. Balanced intake of nutrients and appropriate supplementation of foods rich in vitamins A and B can help alleviate visual fatigue. The best sources of vitamin A are animal liver, milk, eggs, carrots, green vegetables, and fruits. Vitamin A is an essential nutrient for the human body, but it cannot be supplemented in excess. The best sources of B vitamins are grains, yeast, wheat germ, and legumes. Adhering to outdoor activities also has a significant effect on improving vision. Actively exercise and encourage children to engage in outdoor activities. During outdoor activities, the eyes are always in a farsighted state, and the ciliary muscles are relatively relaxed, which can eliminate visual fatigue. Outdoor activities lasting at least 2 hours a day are beneficial for eye relaxation and are the lowest cost and most effective way to prevent myopia. If there is discomfort in the eyes and the symptoms are severe, medical treatment should be used to alleviate it. ——Correct refractive errors. Visual fatigue and accommodation fatigue are often caused by uncorrected refractive errors such as hyperopia and astigmatism. It is recommended to wear glasses suitable for computer operation distance based on age and adjustment status to alleviate discomfort symptoms. ——Targeted functional training can be used to improve the adjustment and aggregation function of the eyes, enhance the coordinated motor ability of both eyes, and maintain their visual function. For example, a flip bat can be used for training to adjust sensitivity. ——Effective hot compress can promote the secretion of lipids by the meibomian gland, alleviate symptoms of dry eyes and visual fatigue. It is recommended to use a disposable hot compress, clean and hygienic, with a temperature controlled at around 42 degrees Celsius and a duration of time