You’re at risk of a corneal ulcer if you:
- Wear contact lenses, especially if you sleep in your contacts.
- Have or have had shingles, cold sores or chickenpox.
- Have dry eyes.
- Have eyelids that don’t close all the way.
- Use steroid eye drops.
- Have an injury or burn on your cornea.
- Have diabetes.
- Have had prior eye surgery.
- Have other eye diseases.