Angle-Closure Glaucoma

Sudden rise in intra-ocular pressure — an ophthalmic emergency.

Written by: Saygı Hospital Health Guide Editorial Board

Last updated: June 11, 2026

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Göz Hastalıkları department. Book Appointment →

What is Angle-Closure Glaucoma?

An acute angle-closure attack causes intra-ocular pressure to rise to 40-70 mmHg as the anterior chamber angle suddenly closes. Without urgent treatment irreversible vision loss can occur within hours.

Risk is higher in hyperopic eyes, small anterior segments, older women and Asian ethnicity. Dim lighting, stress and mydriatic drugs can trigger an attack.

Chronic angle closure progresses insidiously as the angle gradually narrows.

Symptoms

Sudden severe eye pain

Headache, nausea and vomiting

Coloured halos around lights

Sudden visual decrease or blurring

Red eye

Mid-dilated pupil unresponsive to light

Risk Factors

Hyperopia and small anterior segment

Older age and Asian ethnicity

Family history of angle-closure glaucoma

Cataract (lens thickening)

Mydriatic or anticholinergic medication

Prolonged time in dim light

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

Sudden eye pain, headache and blurred vision — IMMEDIATELY to emergency
Sudden halos around lights
Red eye combined with vision loss
Eye symptoms accompanied by nausea and vomiting
Evaluation for prophylactic laser iridotomy when at risk

Treatment Methods

Emergency intra-ocular pressure reduction with topical and systemic glaucoma medications

Intravenous acetazolamide or mannitol

Nd:YAG laser iridotomy after the attack subsides

Prophylactic laser iridotomy of the fellow eye

Combined phaco-trabeculectomy when indicated

Long-term glaucoma follow-up after an attack

Which Department to Visit?

You can visit our Göz Hastalıkları department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Göz Hastalıkları Department

Let us help you

You can make an appointment with our specialists or contact us for your concerns.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.