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Angle-closure glaucoma, also known as narrow-angle glaucoma, is a severe eye disorder in which the drainage angle in the eye gets blocked, preventing fluid from flowing out. This blockage causes a rapid increase in intraocular pressure (IOP), which can damage the optic nerve and cause vision loss if not treated immediately. Angle-closure glaucoma, unlike open-angle glaucoma, frequently appears with abrupt symptoms, requiring immediate medical attention.

Symptoms may include severe eye pain, headaches, blurred vision, halos around lights, nausea, and vomiting. These symptoms can worsen quickly, making early detection and medical intervention crucial. Causes and Risk Factors Individuals who have anatomically small drainage angles, a family history of glaucoma, or hyperopia (farsightedness) are more likely to develop the disorder.

It is also more common in older persons and specific ethnic groups, including Asians and Eskimos. Treatment Immediate treatment includes lowering the increased IOP with drugs or laser procedures, such as a laser iridotomy, which produces a tiny opening in the iris to restore fluid flow.  Long-term treatment may include surgery to avoid recurrence. Regular eye exams are critical for early detection, especially for those at risk. Prompt treatment can save vision and avoid permanent damage.