1. Rainbow vision: This is a very specific symptom at the onset of glaucoma, which appears every night. When looking at lights, especially when looking at round light bulbs, you can see a colorful halo around the lights, like a rainbow after a rain. 2. Foggy vision: There is a momentary blurring of vision, as if looking at the outside world in a fog. If the symptoms are mild and disappear after a good night’s sleep, the symptoms can disappear. 3. Eye swelling and pain: often occurs at the same time as foggy vision, but also separately. When you have the symptoms of eye swelling, please do not forget the possibility of glaucoma. 4.Migraine headache: Some patients with chronic glaucoma often have migraine headache or full headache, so you can see an ophthalmologist to see if you are suffering from glaucoma. 5. People with confirmed glaucoma in one eye may also have glaucoma in the other eye if one of the same symptoms occurs in that eye. According to the above performance, once you predict the possibility of having glaucoma, you should go to the hospital to check and confirm the diagnosis in time.