There are many types of glaucoma, and the symptoms vary between different types. Some patients with glaucoma might not have noticeable symptoms in the early stages; others may only experience mild eye soreness and occasional blurred vision, which can improve with rest; some present with insidious vision decline and field defects. Glaucoma refers to a group of progressive optic nerve damage that eventually impairs vision, mainly associated with pathological elevation of intraocular pressure. Glaucoma is the second leading cause of blindness worldwide, and it is the top irreversible blinding eye disease. Common symptoms of glaucoma include blurry vision, vision decline, field defects, and acute attacks, often accompanied by eye pain, headache, nausea, vomiting, and more. If glaucoma symptoms occur, or there is a suspicion of glaucoma, it is advised to visit an ophthalmology clinic for comprehensive examinations like visual acuity, intraocular pressure, fundus examinations, etc., to determine the cause and provide targeted treatment, actively reduce intraocular pressure, and protect the optic nerve.