Glaucoma is one of the most common blindness-causing eye diseases, causing blindness to patients for various reasons. The common reasons are as follows: 1, open-angle glaucoma and part of chronic closed-angle glaucoma, because there are no symptoms, patients do not know that their eyes are diseased, and once they are found to be advanced or already blind. 2, patients do not listen to doctors, do not trust doctors, do not want to do any examination, will be the best time to treat missed. 3.Insufficient awareness of the dangers of glaucoma, full of care about their disease. Some people just work desperately and never see a doctor until they feel their visual field shrink, then they go to the hospital. At that time, it is often very advanced, and one eye is lost for nothing. 4, can not use the medication on time, when there are symptoms to order drugs, no symptoms when not to order drugs, never measure the IOP, and do not know how their IOP control after ordering drugs. The unreasonable use of medication delays the treatment. 5. Do not listen to the doctor’s advice. Fear of surgery, the prognosis of surgery before the operation of the doctor, can not be treated correctly, always afraid of surgery will be vision loss or even blindness, surgery delayed again and again, until the late loss of the best treatment time. 6, Some patients after surgery, because the symptoms disappear, they think glaucoma has been completely cured, and ignore the tracking observation, regular monitoring, some patients in the postoperative blindness unknowingly. 7.Some patients only pay attention to the observation of IOP after surgery without checking whether the visual field has changed. Some patients have abnormal hemodynamics, such as suffering from cardiovascular disease, hypotension and increased whole blood concentration. Due to the interaction of these factors, the optic nerve is in a chronic state of insufficient blood supply for a long time, which causes progressive narrowing of the visual field and leads to blindness. In view of some of the above, patients with glaucoma are advised that they must heed the advice of their physicians and actively strive for early and effective treatment in order to minimize the damage to their visual function.