What Is a Corneal Ulcer?
Corneal Ulcer Symptoms
A corneal ulcer can cause:
- Severe pain
- The feeling that something is in your eye
- Pus or thick discharge from your eye
- Blurry vision
- Pain when looking at bright lights
- Swollen eyelids
- A round white spot on your cornea
When to call your doctor
Talk to your doctor right away if you notice:
- Vision changes
- Severe pain
- Discharge from your eye
It’s especially important to watch for problems if you’ve scratched your cornea before or if you’ve been around chemicals or small particles like sand, metal, or glass.
Corneal Ulcer Causes
Infections cause most corneal ulcers.
- Bacterial infections
- Viral infections such as the herpes simplex virus (which causes cold sores) or the varicella virus (which causes chickenpox and shingles)
- Fungal infections such as Fusarium, Aspergillus, or Candida, possibly after an injury by something natural like a branch or twig. These infections are rare.
- Parasitic infections with Acanthamoeba, an amoeba found in fresh water and dirt
Corneal Ulcer Risk Factors
People who wear contact lenses are more likely to get corneal ulcers. This risk is 10 times higher if you use extended-wear (overnight) soft contacts.
Bacteria on the lens or in your cleaning solution could get trapped under the lens. Wearing lenses for long periods can also block oxygen to your cornea, raising the chances of infection.
Scratches on the edge of your contact might scrape your cornea and leave it more open to bacterial infections. Tiny particles of dirt trapped under the contact could also scratch your cornea.
Other things that may make you more likely to have a corneal ulcer include:
- Steroid eye drops
- Disorders that cause dry eyes
- Eyelid inflammation (blepharitis)
- Eyelashes that grow inward
- Eyelids that turn inward
- Conditions that affect your eyelid and keep it from closing all the way, like Bell’s palsy
- Chemical burns or other cornea injuries
Corneal Ulcer Diagnosis
See your eye doctor right away. They’ll use a drop of dye and a special microscope called a slit lamp to look for problems.
If your doctor thinks you have an infection, they may take a small sample from the ulcer for analysis in a lab. This can help them decide on the best treatment.
Corneal Ulcer Treatment
Depending on the cause of your ulcer, you’ll probably get antibiotic, antiviral, or antifungal eye drops. You might need to use these as often as once an hour for several days.
To treat pain, your doctor may also give you oral painkillers or drops to widen (dilate) your pupil.
If medications don’t help or if the ulcer is severe, you might need a corneal transplant. Your doctor takes out your cornea and replaces it with a healthy one from another person.
You’ll need to see your doctor every day until they tell you to stop. Call them right away if your symptoms get worse, such as blurry vision, pain, or discharge.
Corneal Ulcer Home Care
Your doctor may also recommend some steps you can take at home to ease symptoms:
Corneal Ulcer Prevention
If you have any eye problems, see your doctor as soon as possible. Even minor injuries can lead to an ulcer.
Wear eye protection when you’re around small particles.
If you have dry eyes or if your eyelids don’t close all the way, use artificial tears to keep your eyes moist.
If you wear contact lenses, be very careful about how you clean and wear them.
- Always wash and dry your hands before handling lenses. Never use saliva to wet your lenses, because your mouth has bacteria that can hurt your cornea.
- Take out your lenses every evening. Carefully clean them with solution, not tap water.
- Never sleep with your contacts in.
- Store the lenses overnight in disinfecting solution.
- Take out your lenses whenever your eyes are irritated. Don’t put them back in until your eyes feel better.
- Regularly clean your lens case.
- Follow your doctor’s instructions on when to throw out and replace your contacts.
Corneal Ulcer Outlook
A corneal ulcer is a medical emergency. Without treatment, it might spread to the rest of your eye, and you could lose some or all of your eyesight in a short time. You can also get a hole in your cornea, scarring, cataracts, or glaucoma.
With treatment, most corneal ulcers get better in 2 or 3 weeks.
If you have trouble seeing because of scars from a corneal ulcer, you might need a corneal transplant.