The incidence of glaucoma increases as we age. Glaucoma is an insidious disease that damages our eyes silently and unobtrusively. Glaucoma has been called a thief that steals vision. Moreover, the damage to vision in glaucoma is irreversible and is the death of nerve cells. Unlike lesions such as cataracts, which can be treated surgically to restore sight. As an elderly person, how to recognize glaucoma and how to prevent it? Once the following symptoms appear, we should be alert if it is glaucoma eye disease: 1. It is the appearance of colorful halos next to the light, as if a rainbow appears in the sky after rain. This is due to elevated eye pressure and corneal edema resulting in corneal refractive changes. 2, eye distension, headache, blurred vision, especially after emotional excitement or staying in dark places for too long (such as after getting angry, watching movies and TV or working in dark rooms), the above symptoms can appear and be relieved after rest, which is an early symptom of closed-angle glaucoma, also known as a minor attack of glaucoma, and after many recurring occurrences, there may be severe eye pain, headache, sharp loss of vision with nausea, vomiting and other symptoms. Sometimes it can be misdiagnosed as acute gastroenteritis and cerebrovascular disease, etc. 3, vision gradually decline, optometry vision correction is less than 1.0 (logarithmic visual acuity table for 5.0), especially high myopia, wearing 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 function impairment includes: decreased visual acuity, reduced visual field, etc. This is because the IOP of normal people has the law of circadian fluctuation, generally high in the morning and low at night, while the 24-hour IOP fluctuation of glaucoma patients is greater, so the morning IOP is higher, and the above symptoms appear. 5, too much water (such as drinking more than 300ml of water at a time), in 15-30 minutes after drinking water appears eye swelling headache, we should pay attention to. This is because drinking water fast 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. In order to prevent glaucoma, we should do the following: 1. Regularly go to the hospital to check your eyes. If someone in your family has glaucoma, you should pay more attention to the hospital for examination. If you have a shallow anterior chamber and your eye pressure is at the upper limit of normal, you are at risk for glaucoma. Regularly visit the hospital to check your fundus and related visual function tests. 2. Glaucoma attacks can be affected by emotions. You should avoid emotional excitement and maintain a stable mood. 3. Live a regular life and try to avoid spicy and stimulating foods. Keep a good sleep. Lack of sleep or insomnia can cause fluctuations in IOP. 4, do not drink a lot of water in a short period of time. Many elderly people have the habit of drinking tea, and drink more. This water can enter the blood in a large amount in a short period of time, causing a decrease in blood osmotic blood pressure, resulting in an increase in intraocular atrial fluid and an increase in intraocular pressure. So the elderly, especially glaucoma patients should pay attention to not binge drinking, the number of times a day to drink tea can be more, but each time the amount should be less, and to drink slowly. At the same time, in addition to the above-mentioned glaucoma health care methods for the elderly, patients should adhere to treatment under the guidance of doctors, adhere to eye drops, so that the eye pressure control is relatively smooth, at least once every six months to review. You should not use vasodilators and sedatives at your own discretion. If the symptoms are stubborn and the IOP continues to rise, surgical treatment can be considered.