Corneal Infections

Corneal ulcer
Corneal ulcer

Corneal Infections (infectious keratitis)

The cornea is the clear (transparent) tissue at the front of the eye. A corneal ulcer is an erosion or open sore in the outer layer of the cornea. It is often caused by infection.


Corneal ulcers are most commonly caused by an infection with bacteria, viruses, fungi, or a parasite.

Corneal ulcers or infections may also be caused by:


Symptoms of infection or ulcers of the cornea include:

Exams and Tests


Treatment for corneal ulcers and infections depends on the cause. Treatment should be started as soon as possible to prevent scarring of the cornea and long-term complications.

Your eye doctor may also recommend that you:

Outlook (Prognosis)

Many people recover completely from corneal ulcers or infections, or they have only a minor change in vision. However, a corneal ulcer or infection can cause long-term damage to the cornea and affect vision.

Possible Complications

Untreated corneal ulcers and infections may lead to: