Dry eye, also known as corneoconjunctival dryness or dry eye, is a very common disease in ophthalmology, especially in the summer and winter are the high incidence season. The incidence of middle-aged and elderly people is higher than that of young people, and people who use cell phones and computers for a long time are also prone to it. The treatment is mainly the following: 1. Promote tear secretion, mainly through warm towel hot compresses on the eyelids as well as pointing hormone drops, such as fluorometholone drops or clotiprenol mixed drops. For patients with severe keratoconjunctival dryness, the tear secretion of the eye can be increased by submandibular gland transplantation. 2. hydrate the eye, the most common way is to order artificial tear drops, such as polyvinyl alcohol drops. 3. reduce the evaporation of tears from the eye surface, for example, you can wear a wet room lens. 4. repair the corneal epithelial damage caused by keratoconjunctival dryness, for example, you can order calf blood deprotein extracts ophthalmic gel.