Glaucoma is not self-tested, but can be detected by symptoms, visual field conditions, and intraocular pressure conditions. 1. Symptoms: Glaucoma may be present if there are symptoms such as eye pain, headache, nausea, vomiting, sudden loss of vision, and eye swelling. 2. Visual field: Cover one eye and look straight ahead with the other to see if your field of vision narrows. If your field of vision narrows, it means that your field of vision is impaired, which may be caused by glaucoma. 3. Intraocular pressure: Close your eyes and gently press down on the eyeballs. If the touch of the eyeballs is similar to the touch of the forehead, and there is a bit of hardness, then there may be high intraocular pressure, and there may be glaucoma. It is recommended that patients who suspect that they have glaucoma should not test themselves, but should go to the ophthalmology department of the regular hospital in time for testing.