---
title: Retinal artery occlusions
description: "Retinal artery occlusions occur when blood flow through a retinal artery is suddenly blocked. This causes painless, often severe loss of vision and is treated as a stroke of the eye. ## Causes and urgency The blockage often comes from…"
url: "https://bluefinvision.com/knowledge-base/topics/conditions-diseases/retinal-artery-occlusions/"
updated: "2025-12-19"
category: "Conditions & Diseases"
---

# Retinal artery occlusions

Retinal artery occlusions occur when blood flow through a retinal artery is suddenly blocked. This causes painless, often severe loss of vision and is treated as a stroke of the eye.

## Causes and urgency

The blockage often comes from a cholesterol plaque or clot travelling from elsewhere. Because retinal tissue is very sensitive, immediate assessment is crucial.

- Central artery occlusion causes sudden, profound vision loss in one eye.
- Branch occlusions affect only part of the visual field.
- Risk factors include high blood pressure, atrial fibrillation, and carotid disease.
- Prompt referral to stroke or medical teams is essential.
- Investigations look for heart and vessel sources of emboli.

## Aftercare and prevention

Visual recovery is often limited, so preventing further events is the main goal. Care focuses on cardiovascular health and close monitoring.

- Blood pressure, cholesterol, and diabetes control reduce future risk.
- Blood-thinning medication may be recommended.
- Smoking cessation is strongly advised.
- Low-vision aids help maximise remaining sight.
- Urgent help is again needed for any new sudden visual loss.