Glaucoma is an eye disease characterized by progressive visual field defects due to pressure in the eye (intraocular pressure) exceeding the tolerance range of a thin sieve plate at the back of the eye, resulting in deformation and distortion of the sieve plate; the optic nerve fibers passing through the sieve hole are damaged. The vast majority of patients have an IOP of 21 mmHg or higher, but a few patients with extremely fragile sieve plates and IOPs less than 21 mmHg also have typical glaucoma manifestations, called “normal IOP glaucoma”. Glaucoma can occur at any age and has a genetic tendency. Patients initially present with visual field defects, and because vision is not affected in the early stages, most patients become paralyzed and lose their vigilance. Moreover, there is an adaptation process for patients as glaucoma continues to worsen and progress, adding to the insidious nature of glaucoma (which is one of the most frightening aspects of glaucoma). During the progression of the disease, most patients have no pain, no itching, and their vision is not greatly affected. By the time a patient notices that he or she is “seeing blurry,” the disease is already advanced and the visual field defects are quite severe. In the advanced stage, the affected eye seems to see through a paper tube (medically called tubular vision), when the patient looks at a person’s face but cannot see the person’s body, and the field of vision is very narrow. Since, the field of vision is so narrow, in order to see things clearly, the patient will stare wide but can only see a small area in front of them. They often bump into things near their feet when walking, and it is very dangerous to walk on the street at this time because they cannot see the bicycles and cars moving rapidly in front of them and can easily be knocked down and injured. If it is not detected in the late stage, the patient will gradually become blind, and the last canal vision will disappear, and the patient will be in darkness from then on, and it is meaningless to seek medical help at this time, because glaucoma is “irreversible”. The best treatment for glaucoma is to preserve the remaining visual fields through effective treatment. In addition to eye swelling, eye pain, blurred vision, and a rainbow-like aura when looking at lights in the evening (iridopsia), patients also have headaches, nausea, and even vomiting, constipation and other gastrointestinal symptoms, which are medically known as “acute glaucoma. These patients often seek medical attention in time to avoid serious vision and visual field damage because of the obvious discomfort.