The so-called dry eye is a type of disease caused by the instability of the tear film and damage to the ocular surface due to abnormalities in the quality and quantity of tears or abnormal tear fluid dynamics, which leads to dryness, fatigue, foreign body sensation and other discomforts in the eye. There are many causes of dry eye, such as certain systemic diseases (dry syndrome), local inflammation of the eye (conjunctivitis), abnormal eyelid position (eyelid defect), wearing corneal contact lenses, being in an air-conditioned environment for a long time, facing a fluorescent screen for a long time, driving at night (lid opening, reduced transient, excessive tear evaporation), certain drugs (sedatives, antispasmodics, decongestants), cosmetics, eye drug abuse, eye chemical injuries, thermal burns, multiple surgeries, head radiation therapy, age, swimming, partiality, malnutrition, dust, smoke, etc. The key to dry eye treatment is to address the cause. For people who are in air-conditioned rooms for a long time, it is important to keep the environment moist. When using computers, watching TV and wearing contact lenses, be careful not to spend too much time and to blink more consciously to increase tear secretion. Also, keep televisions and computers placed below eye level. This is because when the eyes look down, it reduces the area exposed to the air and reduces tear evaporation. The distance from the computer screen to the eye is about 40-70cm. After 1-2 hours of use, rest for 10-15 minutes, look into the distance and rest your eyes. You can usually eat more foods rich in vitamin A, such as animal liver, eggs, carrots, etc. You can also drink more water to improve the internal environment. Mild dry eye patients can be given artificial tears with small viscosity (to reduce transient blurred vision); moderate patients can be given artificial tears with large viscosity (to extend the eye surface dwell time), try to use artificial tears without preservatives (so as not to damage the eye surface with preservatives) and it is best not to exceed 3 drops a day (too frequent drops will completely wash away the normal tear film and speed up tear evaporation), or use tear dots plugs for Treatment; severe tear deficiency dry eye can be treated with permanent tear punctal closure (thermal cautery, surgical excision, argon laser), or autologous free submandibular gland transplantation also has some therapeutic effect. Combination therapy is also an effective way to improve the effectiveness of dry eye treatment, for example, for post-ovariectomy patients, perimenopausal women, patients after pelvic radiotherapy, and elderly women, whose estrogen secretion is significantly decreased, resulting in reduced tear production, such patients should be treated with artificial tears in addition to combined estrogen replacement therapy to achieve satisfactory results. At present, people still do not know enough about dry eye, and a considerable part of dry eye is treated as chronic conjunctivitis, so a large number of eye drops are used for a long time. Therefore, patients with the above-mentioned dry eye symptoms should consult a medical professional to avoid delaying their condition.