Diagnostic criteria of glaucoma 1. Headache: One of the diagnostic criteria of glaucoma, headache is often the first symptom of glaucoma patients. However, unlike general headache, it can be relieved by sedative and antinociceptive drugs. Because glaucomatous headache is caused by elevated intraocular pressure pressing on the eye tissue, it can only be reduced or eliminated after the intraocular pressure drops. Glaucoma headache is often accompanied by orbital and nasal root distension, and the headache in one eye may also manifest as a severe migraine. 2. Visual impairment: one of the diagnostic criteria for glaucoma, glaucoma disease has significant vision loss during acute attacks. In addition to corneal edema, the main cause is the damage to the optic nerve caused by the increase in intraocular pressure. The higher the intraocular pressure, the greater the pressure on the optic nerve, and the more pronounced the vision loss. Some early patients do not have obvious vision loss, but only foggy vision and blurred vision at night, which disappears the next day after a good rest, are the precursor symptoms of glaucoma onset, which should not be ignored. 3. iris vision: one of the diagnostic criteria for glaucoma, is that when the patient develops, there is a rainbow-like circle of light around the light when looking at it. The outer circle is red and the inner circle is green or violet-blue. This is due to increased intraocular pressure, which causes corneal edema due to impaired fluid circulation in the eye and produces refractive changes. When the eye pressure returns to normal, the iris disappears. However, iridophoria is not unique to glaucoma and can occur with cloudy lens or conjunctival secretions, although the hue is not as sharp as typical iridescence. It is also not as episodic as the iris of glaucoma and is not accompanied by symptoms such as headache. 4, nausea and vomiting: one of the diagnostic criteria for glaucoma, nausea and vomiting caused by gastrointestinal disorders are also common, but they are also often accompanied by symptoms such as abdominal pain or changes in the number of bowel movements, which can mostly be relieved with anti-vomiting and analgesic drugs, which can be differentiated. In contrast, nausea and vomiting during glaucoma attacks will only be reduced or eliminated when the IOP drops. Sometimes the IOP can be lowered after vomiting and there is a temporary improvement, but the IOP is still high, and the iris and headache are still present. There are many symptoms associated with glaucoma, so we suggest that you should visit the ophthalmologist.