closed-angle glaucoma

In this type, the angle in the eye is closed, or blocked. This prevents the fluid inside the eye from draining and causes the pressure in the eye to rise. In some people, the blockage happens very suddenly and causes severe pain and vision loss. This is called “acute closed-angle glaucoma.” In other people, it happens slowly over time, and might cause periods of headaches. This is called “chronic closed-angle glaucoma.” Closed-angle glaucoma is a serious condition and needs to be treated immediately.