Patients with Primary Open-Angle Glaucoma and Chronic Angle-Closure Glaucoma often do not notice any symptoms in the early stage, because the disease is slowly progressive. When more severe damage occurs, the patient may initially complain of poorer night vision and loss of peripheral vision. Because the disease is often slowly progressive and occurs more commonly among the middle-aged to elderly, patients often assume that the blurring of vision may be related to cataract formation and do not seek medical attention early. In fact, it is often during an assessment for cataract that glaucoma is detected. Central vision is usually affected only in the advanced stage, where a significant amount of irreversible damage may have occurred already.


Acute angle-closure glaucoma presents acutely with a sudden onset of eye pain, redness, blurring of vision and haloes around lights. The pain may be severe enough to cause nausea and vomiting. This is an eye emergency and the patient should be seek medical consultation immediately.