The diagnosis of dry eye disease places great emphasis on the patient’s conscious symptoms, which are mainly as follows: 1. Patients have a grinding sensation in both eyes, sandy sensation, itching sensation, such as burning sensation, eye redness, vision loss, and sticky discharge, and visual fatigue; 2. Unnameable discomfort, especially under the stimulation of smoke or light, the symptoms will be aggravated. Some patients with dry mouth and joint pain can know whether they have dry syndrome; 3. Some patients with dry eye, caused by abnormal tear secretion, have heavier symptoms in the morning. When inquiring about the patient’s condition, it is important to ask more about the patient’s external factors, such as whether the air conditioner has been on for a long time, whether there has been too much time driving, or wearing contact lenses for too long, or whether there has been a series of problems such as surgery or trauma, which need to be taken into account. If a patient has such a manifestation, he or she needs to seek medical attention early and be given adequate examination and treatment early.