Causes of an acute painful red eyeinclude:
- Acute angle-closure glaucoma
- Anterior Uveitis
- Scleritis
- Corneal abrasions or ulceration
- Keratitis
- Foreign body
- Traumatic or chemical injury
Causes of an acute painless red eyeinclude:
- Conjunctivitis
- Episcleritis
- Subconjunctival haemorrhage