1. The typical symptoms of glaucoma are headache or eye pain, blurred vision, nausea or vomiting, iridescence around lights and sudden loss of vision. The atypical symptoms of glaucoma are occasional blurred vision with iridescence, transient eye swelling and headache, which can be relieved and may recur. It is particularly likely to occur in the evening. 2. The late symptoms of glaucoma are visual field defects or significant loss of vision when alternately covering both eyes. However, about 90% or more of glaucoma patients do not have these symptoms or even feel them, and they are found by chance when doctors examine them. Therefore, the following people should have regular eye examinations in order to detect early glaucoma and start treatment in time, which can effectively avoid irreversible damage to the optic nerve: (1) A family history of glaucoma disease. (2) Those with a history of attacks (headache, eye pain, rainbow vision, blurred vision). (3) Those with atypical symptoms (often manifested as transient or recurrent episodes of hazy vision, rainbow vision, frontal pain, nasal root soreness, etc., occurring mostly in the evening, similar to visual fatigue). (4) People with high hyperopia and myopia. (5) Patients with diabetes mellitus. (6) People over 35 years old who have not had an eye examination for a long time. (7) Infants and children with black eyes significantly larger than other children, or black eyes of both eyes unequal in size.