Glaucoma is the world’s second largest blindness-causing eye disease, its vision damage is irreversible, also known as the “thief of light”, why? Because many people do not know that they have glaucoma, and by the time it is discovered, irreversible vision damage has already occurred, so early detection, early diagnosis and early treatment are very important. So how can glaucoma be detected early? People over the age of 35 should have regular glaucoma screenings. Broadly speaking, all adults should be screened for glaucoma every few years. Generally speaking, a glaucoma exclusion test should be performed between the ages of 35 and 40, every 2 to 3 years after age 40, and every 1 to 2 years after age 60. Also, key examinations should be performed for people over 50 years of age, people with a family history of glaucoma, people with diabetes, people with high myopia (greater than 600 degrees), nocturnal hypotension, sclerotic and ischemic vascular lesions, and people with central retinal vein obstruction, who are at high risk for glaucoma. In addition, people with glaucoma-like symptoms, including eye swelling, eye pain, iris (colored halos in vision); eye swelling and pain that occur easily in dark environments; a smaller range of self-perceived vision, and unexplained visual fatigue, should also be screened. The local anatomical structure of the eye of glaucoma patients is mutated, and this mutated structure has a genetic tendency, so glaucoma patients should not only set their own review, but also their immediate family members should be tested regularly, including measuring intraocular pressure, checking atrial angle, checking visual field, testing optic nerve and visual function, and doing 24-hour intraocular pressure monitoring and glaucoma provocation test if necessary.