Glaucoma is a disease involving the optic nerve, manifesting as eye distension and pain, visual field defects and vision loss, which can lead to blindness in late stages, so it must be detected and treated early. Early symptoms may include the following: 1. headache when drinking more water: often the eye distension and headache occurs 15-30 minutes after drinking a lot of water. 2.Emotional excitement or staying too long in dark places (such as watching movies or working in a dark room), there will be eye swelling, headache and blurred vision. 3.After waking up in the morning, it is hard to read books and newspapers, and it is easy to have soreness at the root of the nose and swelling of the orbital forehead. 4.The vision correction of optometry is less than 1.0, and there is often eye swelling and headache even after wearing moderate glasses. 5, often feel eye fatigue discomfort, eyes often sore, eyes often feel dry, will be relieved after rest. 6.Myopia or presbyopia suddenly deepen, or presbyopia age in advance, and the degree increases too fast. If the above symptoms occur, it is best to go to the hospital to investigate glaucoma: (1) IOP measurement to see if the intraocular pressure is too high; (2) Visual field examination to see if there are defects in the visual field; (3) observation of the optic disc by means of fundoscopy, slit lamp prescan or fundus photography.