---
title: What are warning signs of advanced diabetic retinopathy?
description: "[Warning signs of advanced diabetic retinopathy](https://bluefinvision.com/blog/what-are-the-stages-of-diabetic-retinopathy/) often appear once the retina is already under significant strain. Recognising them early helps protect remaining vision. ## Changes you might notice Vision problems may come on gradually or suddenly. Any new symptom in…"
url: "https://bluefinvision.com/knowledge-base/topics/symptoms-signs/what-are-warning-signs-of-advanced-diabetic-retinopathy/"
updated: "2026-01-22"
category: "Symptoms & Signs"
---

# What are warning signs of advanced diabetic retinopathy?

[Warning signs of advanced diabetic retinopathy](https://bluefinvision.com/blog/what-are-the-stages-of-diabetic-retinopathy/) often appear once the retina is already under significant strain. Recognising them early helps protect remaining vision.

## Changes you might notice

Vision problems may come on gradually or suddenly. Any new symptom in someone with diabetes should prompt a prompt eye review.

- Blurred or patchy central vision that affects reading or driving
- Sudden shower of floaters or dark spots suggesting bleeding
- Wavy or distorted lines, especially on straight objects
- Dark curtain or shadow moving across part of the visual field

## When to seek urgent help

Advanced disease can involve new blood vessels, bleeding, or retinal detachment. Quick treatment greatly improves outcomes.

- Contact emergency eye services if vision drops quickly or pain develops
- Attend all screening appointments even if sight seems normal
- Keep blood sugar, blood pressure, and cholesterol well controlled
- Ask your team about laser or injection treatments if advised