---
title: What causes corneal cloudiness?
description: "Corneal cloudiness occurs when the normally clear cornea becomes opaque or hazy, blocking or scattering light. It can be congenital or acquired. ## Causes Corneal oedema from endothelial failure, infection, trauma, dystrophies, scarring, and chemical injury are major causes. Keratoconus,…"
url: "https://bluefinvision.com/knowledge-base/topics/symptoms-signs/what-causes-corneal-cloudiness/"
updated: "2025-12-12"
category: "Symptoms & Signs"
---

# What causes corneal cloudiness?

Corneal cloudiness occurs when the normally clear cornea becomes opaque or hazy, blocking or scattering light. It can be congenital or acquired.

## Causes

Corneal oedema from endothelial failure, infection, trauma, dystrophies, scarring, and chemical injury are major causes. Keratoconus, advanced pterygium, and inherited metabolic diseases can also cloud the cornea.

- Acute hydrops in keratoconus produces sudden painful clouding
- Long‑standing oedema from Fuchs' dystrophy leads to morning blur and glare
- Severe infections may leave permanent scars after healing
- Congenital corneal opacities may signal underlying systemic disorders

## Clinical Implications

Corneal cloudiness often reduces vision and may cause photophobia or discomfort. Treatment ranges from medical therapy to corneal transplantation.

- Early treatment of infection or oedema improves prognosis
- Specular microscopy and imaging help assess endothelial and stromal health
- Children with cloudy corneas need urgent specialist evaluation
- Protecting the eye from further trauma or dryness is essential