Dry eye is a medical term used to describe a group of different manifestations or symptoms caused by the eyes not being moistened and lubricated with enough tears, such as dryness, fatigue, burning, foreign body sensation, frosting, sensitivity to light, increased mucous discharge, and in some cases, eye congestion, stinging, and difficulty concentrating. It can often be misdiagnosed or confused with the manifestations of other diseases, such as mild infections or allergies. Dry eye is not always characterized by dry eyes, but in some people it can be characterized by excessive tearing. There are many factors that can cause dry eyes such as diseases conjunctivitis, keratitis, rheumatoid arthritis, etc. The common factors in life are mainly aging, prolonged gaze at the computer screen or reading, wearing contact lenses, air-conditioned environment, environmental pollution, etc. It is worth noting that the preservatives in some eye drops have a greater impact on the corneal epithelium, which can easily lead to dry eyes after long-term use instead. Mild eye dryness, burning and other discomfort can be their own point artificial tears, or heavy symptoms or medication after 3 days still can not be alleviated or even aggravated, or go to the hospital as soon as possible to ask the doctor for consultation and treatment.