Dry eye is a common disease in ophthalmology and is an eye disease with impaired tear secretion. Dry eye is often associated with poor eye use, environmental factors, genetic factors, age factors and diseases. Dry eye disease is a chronic disease, need to clarify the cause, give targeted treatment to eliminate the cause, long-term regular use of artificial tears can help alleviate the symptoms, but can not completely cure. 1, poor eye: long-term bad eye habits can cause dry eye disease, such as long-term eye, long-term look at the computer or cell phone, you can change the bad eye habits in life, reasonable eye, pay attention to proper rest, reduce the time to play mobile phone, computer, and so on. Reduce the time of playing with cell phones and computers, eliminate the triggers, dry eye will gradually improve, can try to alleviate; 2, environmental factors: long-term in air-conditioned rooms or rooms with poor air circulation, long time in the dark environment to watch movies, long time driving to reduce the transient eyes, tear evaporation speed up, it will cause dry eye; 3, genetic factors: can also lead to dry eye, genetically caused by dry eye in the clinical can not Effective intervention and treatment of dry eye caused by genetics can not be carried out clinically, but can only be alleviated by improving other causes in life; 4, age factor: with age, the function of the tear-secreting glands in the eye will gradually degenerate, so that the secretion of tears will be reduced, thus causing dry eye, can be alleviated by supplementing vitamin C and vitamin E to dry eye, but can not be cured; 5, disease factors: inflammatory reactions occur in the eye, stimulating the eye glands, appearing dry eye, which can be relieved by anti-inflammatory treatment. Poor eyelid closure and reduced blinking due to eyelid disease, which causes excessive evaporation of tears, can also be caused. Patients with lid gland insufficiency can cause insufficient secretion of the oil layer, which can cause dry eye. In addition, systemic diseases such as dry syndrome, hyperthyroidism, and diabetes can manifest in the eye as reduced tear secretion, poor tear treatment, and tear film instability, requiring active treatment of systemic diseases along with treatment of eye symptoms. Dry eye caused by environmental factors, when leaving the triggering environment and changing bad habits, the symptoms of dry eye will slowly improve. Dry eye caused by ageing is generally difficult to reverse and measures can only be taken to alleviate the symptoms of dry eye. For dry eye caused by disease, you can actively treat the disease to reduce the symptoms, such as dry eye in patients with lid gland insufficiency, which can be relieved by applying heat to the line, but it is more difficult to eradicate.