Common glaucoma can be divided into primary and secondary, with primary predominating. Primary can be further divided into primary open-angle and closed-angle types. The open-angle type has fewer symptoms and the closed-angle type has more symptoms. Among them, primary acute closed-angle glaucoma can be divided into 6 periods: preclinical, aura, acute onset, intermittent, chronic and absolute, and different periods have different characteristic tables. So to speak, these manifestations are all the symptoms that may appear in glaucoma patients. In the preclinical period, the patient’s autonomic sensation is not obvious, but by dark room test or after working in a dark environment for a long time, it triggers a significant increase in intraocular pressure and a feeling of eye distension and pain. In other words, this dark environment can trigger an acute attack of glaucoma. The aura phase of glaucoma is characterized by one or more small episodes with a transient increase in intraocular pressure, mostly in the evening, foggy vision, iris vision, and migraine or nasal root pain, which can be relieved by rest. During the acute phase, which is often referred to as a major glaucoma attack, the intraocular pressure rises to 40 mmHg or more, and the patient experiences severe headache, eye pain, photophobia, tearing, and severe vision loss, which may be reduced to the index or manual, and may be accompanied by nausea and vomiting and other systemic symptoms. After an acute attack, if treated promptly and properly, the IOP completely returns to normal and the disease can enter the intermittent phase; patients in the intermittent phase generally have no obvious symptoms. However, if triggering factors are present again, the attack can still recur. If the condition is not treated in time, it enters the chronic phase, during which the IOP will continue to be higher than the symptoms and will intermittently have acute attacks. As a result of long-term IOP elevation, the optic nerve atrophies and irreversible visual field damage occurs. If the increased IOP is not effectively treated, the end point of the disease is the absolute phase. At this point, the optic nerve is severely damaged, the field of vision is reduced to a tubular field or even disappears, and vision can be reduced to no light perception, with varying degrees of pain, sometimes very intense, or some patients tolerate the high IOP state and do not feel pain, but the loss of vision is irreversible. In conclusion, glaucoma is a serious eye disease that can lead to irreversible blindness. When symptoms of suspected glaucoma appear, or when fundus manifestations of suspected glaucoma are found during physical examination, timely hospital screening is required to avoid irreversible visual field damage.