Various pathogenic factors put the conjunctiva in a damaged state, causing lesions that lead to edema called conjunctival edema; if not properly taken care of, it can cause keratitis and corneal ulcers in mild cases, or infection or even blindness in severe cases. What is the preventive care for conjunctival edema and corneal ulcers? 1, personal hygiene: develop good personal hygiene habits, pay attention to cleanliness at all times, wash hands with soap frequently, and keep dry. 2, avoid contact infection: avoid rubbing the eyes with your hands: rubbing the eyes with your hands has many harmful effects, especially for children. Children are active and their hands are always dirty. Rubbing the eyes with dirty hands can bring some germs into the eyes and cause eye inflammation, and sometimes they can rub sand from their hands into their eyes. When playing with a child who has an eye disease, rubbing your eyes with your hands can infect you with the same eye disease. If one eye is red and itchy, rubbing your eyes with your hands can pass the eye disease to the other eye. If the eyes into the sand and other foreign objects, rubbing the eyes with your hands is like rubbing your eyes back and forth with a grinding wheel, causing epithelial damage to the black eye, and in serious cases, the onset of infection, if the eyes itch, you can drop anti-inflammatory eye drops, eyes into the sand, you should first flush with anti-inflammatory eye drops, and then go to the hospital for treatment, never rub your eyes with your hands. 3. Prevention during the disease period: Avoid going to crowded public places as much as possible during the epidemic. Avoid swimming in public swimming pools during the epidemic period. Avoid shaking hands with patients and touching towels, soap, bedding, door handles, faucets, etc. used by patients. 4.Prevention during the healing period: After the patient has recovered, his used quilts and towels should be washed and completely exposed to the sun. Patients should maintain physical and mental health, do not sleep late, do not drink, do not smoke, etc., in order to effectively prevent or reduce the symptoms. 5, to pay attention to the usual diet nutritional health: to protect the eyes is not only drops of advanced eye drops, from the diet habits are more important. Because the eyes need tears to moisten, and tears contain a variety of nutrients, the most important of which is vitamin B2; the process of seeing things needs the participation of vitamin A; optic nerve conduction and need the help of vitamin B; to prevent the aging of the eyes need healthy blood vessels, vitamin C and vitamin E is very helpful. Vitamin A is a vitamin that we Chinese tend to be deficient in. In the absence of vitamin A, the eyes often feel dry, astringent, easily fatigued, and in severe cases, the white surface of the eyes is dry and wrinkled, even leading to corneal ulcers. Before these symptoms occur, a person’s dark vision has been reduced and dark adaptation ability is poor, which means that it is difficult to adapt when going from light to dark for a long time. Vitamin A supplementation should include more liver, milk, egg yolk, green leafy vegetables, carrots, and sweet potatoes. Lack of vitamin B2 tends to inflame the corners of the mouth, lips and tongue, and also makes the eyes dense with blood, afraid of light and prone to tears. 6, avoid excessive use of the eyes: prolonged use of the eyes and cause excessive use of the eyes, is a major cause of eye fatigue. The general symptoms of eye fatigue are blurred vision for a long time, some even unable to write or read, dry eyes, dizziness and pain, and in severe cases, nausea and vomiting. In addition, eye strain also leads to myopia or premature blurring in adults, and various eye diseases can come along with excessive eye use. Protect your eyes, prevent vision damage, reduce eye strain, ensure appropriate light, maintain proper operating posture, ensure rest and do eye exercises.