(1) vision loss: in most cases, vision loss sharply during acute attack. In severe cases, only the index of the eyes is seen, and even only the light perception is left. On the one hand, it is due to corneal edema, on the other hand, it is also very important. If high intraocular pressure is not relieved, it will soon lead to blindness. If the intraocular pressure drops rapidly, the postoperative vision can be significantly improved, and even some cases are blind for several weeks.

(2) Congestion: When the intraocular pressure rises, it is not necessarily complicated with ocular surface congestion. If the intraocular pressure continues to rise and exceeds the intraocular venous pressure, venous congestion will occur, first there will be mild ciliary congestion, and then all conjunctiva and sclera will be congested. Sometimes there may be mild conjunctival edema, even eyelid edema, and iris blood vessels will be filled. When congestion occurs, aqueous humor may flash and start to hurt.

(3) Pain: The degree of pain caused by acute angle-closure glaucoma varies from person to person, which can cause eye discomfort and swelling around the eyes, and even the most serious eye pain and headache. Usually, the more obvious the local congestion in the eyes, the more serious the pain. Pain is distributed along the trigeminal nerve, and can also be confined to the eyes or spread to the forehead, ears, maxillary sinus and teeth. If you don't check carefully, it is easy to cause misdiagnosis, which deserves attention.

(4) Intraocular pressure: During acute attack, the intraocular pressure rises suddenly, generally above 5.20kPa(40mmHg), and in severe cases, it can reach above 13.4 kPa( 100 mmHg). For such cases, if they are not treated in time, they can often become blind within 24 ~ 48 hours. Some people call it fulminant glaucoma, others call it fulminant glaucoma.