---
title: What causes grey curtain across vision?
description: "A grey curtain across vision is a classic warning sign of retinal detachment or other serious eye problems. ## Retinal causes When the retina detaches or large areas stop receiving blood, part of the visual field can fade or darken.…"
url: "https://bluefinvision.com/knowledge-base/topics/symptoms-signs/what-causes-grey-curtain-across-vision/"
updated: "2025-12-31"
category: "Symptoms & Signs"
---

# What causes grey curtain across vision?

A grey curtain across vision is a classic warning sign of retinal detachment or other serious eye problems.

## Retinal causes

When the retina detaches or large areas stop receiving blood, part of the visual field can fade or darken.

- Rhegmatogenous retinal detachment following a retinal tear
- Vitreous haemorrhage casting a dense shadow
- Advanced diabetic eye disease with traction on the retina
- Retinal vein or artery occlusions in severe cases

## Urgent action needed

A grey curtain is always an emergency until proven otherwise. Delay risks permanent sight loss.

- Seek same-day emergency eye care or attend A&E
- Describe exactly when and how the curtain appeared
- Do not drive yourself if vision is compromised
- Prompt surgery or laser can often prevent further damage