---
title: "What are acute angle-closure glaucoma symptoms?"
description: "Acute angle-closure glaucoma occurs when drainage inside the eye suddenly blocks, raising pressure sharply. Symptoms are dramatic and painful. ## How an attack feels People usually experience severe eye pain and headache on one side. Vision deteriorates rapidly. - Intense…"
url: "https://bluefinvision.com/knowledge-base/topics/symptoms-signs/what-are-acute-angle-closure-glaucoma-symptoms/"
updated: "2025-12-31"
category: "Symptoms & Signs"
---

# What are acute angle-closure glaucoma symptoms?

Acute angle-closure glaucoma occurs when drainage inside the eye suddenly blocks, raising pressure sharply. Symptoms are dramatic and painful.

## How an attack feels

People usually experience severe eye pain and headache on one side. Vision deteriorates rapidly.

- Intense pain in and around the eye
- Blurred vision with rainbow haloes around lights
- Nausea, vomiting, and general malaise
- Red eye with a hard, tender eyeball

## Immediate steps

This condition is a true emergency. Delayed treatment can permanently damage the optic nerve within hours.

- Call emergency services or attend hospital immediately
- Do not wait to see if symptoms settle
- Family members may be advised to have their angles checked
- Laser peripheral iridotomy is often performed to prevent further attacks