Glaucoma is an irreversible and serious group of blinding eye diseases that affects approximately 4% of the world’s population and is estimated to be undiagnosed in 50% of glaucoma cases. By 2010, it is estimated that more than 60.5 million people worldwide will have closed-angle glaucoma or primary open-angle glaucoma. The number of glaucoma cases in modern society is gradually increasing, and glaucoma has become one of the common diseases in ophthalmology, and the age of onset of glaucoma is getting younger and younger, which is mainly due to the increasingly fierce competition in modern society and the increasing pressure on young people, and the computer has become the main tool for work, study and life, which is also one of the causes of glaucoma, and young people, unlike the elderly, still have decades to go. If they are not aware of glaucoma once they are suffering from it, it will be a fatal blow to them and bring a heavy burden to their families and society when they are found to be at an advanced stage. Therefore, early detection of glaucoma and early treatment are the keys to solve this problem. So, how to detect glaucoma early. 1, eye distension, headache, blurred vision, especially after emotional excitement or staying too long in dark places (such as anger, watching movies and TV, working with head down, concentrating too much or working in dark rooms), the above symptoms can appear and be relieved after rest, which is the early symptom of closed-angle glaucoma, also known as a small attack of glaucoma, and after repeatedly occurring many times, there may be severe eye pain, headache, vision This is an early symptom of closed-angle glaucoma, also known as glaucoma minor attack, and after repeated occurrences, there may be severe eye pain, headache, rapid loss of vision, accompanied by nausea, vomiting and other symptoms. This is due to a sharp increase in intraocular pressure, which stimulates the trigeminal nerve terminals and reflexively causes pain in the trigeminal nerve distribution area, and patients often feel migraine and eye swelling pain. Elevated IOP can also reflexively cause excitation of the vagus nerve and the vomiting nerve center, resulting in severe nausea and vomiting. Glaucoma is common in middle and old age, especially in women. Most of the causes of glaucoma are mental related, such as major mental stimulation, excitement, insomnia and overexertion, etc. All of them are easily triggered. 2, premature appearance of presbyopia, such as the appearance of presbyopia before the age of 40 (but to be distinguished from the early appearance of farsightedness presbyopia), especially in women, presbyopia glasses degree change quickly, need to change glasses frequently, which indicates that it is related to eye regulation decompensation, which is proportional to the degree of early glaucoma lesions. 3, vision gradually decline, optometry vision correction less than 1.0 (logarithmic visual acuity table for 5.0), especially highly myopic people, with moderate glasses still often have a headache and eye distension. Because the sclera of highly myopic eyes becomes longer and less elastic, when high intraocular pressure occurs, the self-conscious symptoms are not obvious or asymptomatic, which cannot attract the patient’s attention, and the doctor is prone to miss the diagnosis, while the visual function damage is getting worse. (Visual impairment includes loss of visual acuity, reduced visual field, etc.). When the IOP rises to 25 mm Hg, the eye is as hard as an inflated ball when touched with a finger. When the pressure rises to 40-70 mm Hg, and then pressed with the finger, the eye is as hard as a stone. 4. Rainbow vision appears at night when looking at lights, that is, a colorful halo appears next to the lights, as if a rainbow appears in the sky after rain. Due to the elevated intraocular pressure, the corneal edema caused by the impaired circulation of body fluids in the eye, refractive changes, when looking at daylight, especially when looking at lights, there will be an outer circle of orange rainbow, inner circle of purple orchid, the middle of the green color ring phenomenon. When the eye pressure returns to normal, the ring disappears. This phenomenon is known as iridopsia in medical terms. If the iris is physiological or cataractous, there is no headache or elevated intraocular pressure. 5.If you drink too much water (such as more than 300ml of water at a time), you should pay attention if you have eye swelling and headache after drinking water for 15 – 30 minutes. This is because drinking water quickly and in large amounts can make the blood dilution cause osmotic pressure to decrease, and the atrial water entering the eye will increase, thus causing an increase in intraocular pressure. 6, after waking up in the morning, reading books and newspapers is more difficult, there is a sore nose and orbital forehead distension, this is because the normal intraocular pressure has the law of diurnal fluctuations, generally high in the morning, low at night, and glaucoma patients 24-hour intraocular pressure fluctuations are greater, so the morning intraocular pressure is higher, and the above symptoms.