Keratitis

Symptoms

Common signs and symptoms of Keratitis include:

Eye pain that ranges from mild to severe

Feeling like something is stuck in your eye

Excessive tearing or watery discharge

Redness in the white part of the eye

Blurred or decreased vision

Sensitivity to bright light

Difficulty keeping the eye open

Thick, colored discharge from the eye

Seeing halos around lights

Swollen eyelids

Burning or stinging sensation

White or cloudy spot on the cornea

When to see a doctor

If you experience severe or worsening symptoms, seek immediate medical attention. Always consult with a healthcare professional for proper diagnosis and treatment.

Causes & Risk Factors

Several factors can contribute to Keratitis.

Keratitis develops when your cornea becomes damaged or infected, creating an opportunity for inflammation to take hold.

Keratitis develops when your cornea becomes damaged or infected, creating an opportunity for inflammation to take hold. Infections represent the most serious cause, with bacteria, viruses, fungi, or parasites invading the corneal tissue. Bacterial keratitis often strikes contact lens wearers who don't follow proper hygiene, while viral keratitis frequently results from the herpes simplex virus reactivating.

Physical trauma creates another pathway to keratitis.

Physical trauma creates another pathway to keratitis. A scratch from a fingernail, tree branch, or contact lens can damage the corneal surface, allowing bacteria to enter. Even something as simple as rubbing your eyes too vigorously or getting hit by a small particle can create microscopic tears that become inflamed.

Non-infectious causes include dry eyes, autoimmune conditions, and exposure to irritating chemicals or ultraviolet light.

Non-infectious causes include dry eyes, autoimmune conditions, and exposure to irritating chemicals or ultraviolet light. People with conditions like rheumatoid arthritis or Sjögren's syndrome face higher risks because their bodies don't produce enough tears to keep the cornea properly lubricated and protected from environmental threats.

Risk Factors

Wearing contact lenses, especially overnight
Poor contact lens hygiene practices
History of cold sores or herpes infections
Having dry eye syndrome
Using corticosteroid eye drops long-term
Recent eye injury or surgery
Weakened immune system
Living in tropical or humid climates
Swimming in contaminated water
Working outdoors without eye protection

Diagnosis

How healthcare professionals diagnose Keratitis:

1
When you visit an eye doctor with suspected keratitis, they'll start with a comprehensive eye examination using a special microscope called a slit lamp.
When you visit an eye doctor with suspected keratitis, they'll start with a comprehensive eye examination using a special microscope called a slit lamp. This device allows them to magnify and illuminate your cornea, revealing any scratches, cloudy areas, or signs of infection that aren't visible to the naked eye. Your doctor will also test your vision and check how well your pupils respond to light.
2
If an infection is suspected, your doctor may gently scrape a tiny sample from your cornea for laboratory testing.
If an infection is suspected, your doctor may gently scrape a tiny sample from your cornea for laboratory testing. This culture helps identify the specific organism causing the problem, ensuring you receive the most effective treatment. Don't worry - this procedure is done with numbing drops to minimize discomfort. Additional tests might include tear production measurements or special stains that highlight damaged areas of the cornea.
3
Your doctor will also rule out other eye conditions that can mimic keratitis, such as conjunctivitis, iritis, or glaucoma.
Your doctor will also rule out other eye conditions that can mimic keratitis, such as conjunctivitis, iritis, or glaucoma. They'll ask detailed questions about your symptoms, contact lens habits, recent activities, and medical history. The combination of physical examination findings and your symptom pattern usually provides a clear diagnosis within a single visit.

Complications

When keratitis goes untreated or doesn't respond well to initial treatment, it can lead to permanent scarring of the cornea.
These scars can significantly impair vision, creating blind spots or making everything appear hazy.
In severe cases, the infection can penetrate deeper into the eye, causing more serious conditions like endophthalmitis, which threatens the entire eye.
Corneal perforation represents the most serious acute complication, where the infection literally creates a hole through the cornea.
This medical emergency requires immediate surgical repair and can result in permanent vision loss or even loss of the eye.
Some people develop chronic keratitis that recurs repeatedly, particularly with viral causes like herpes simplex.
While these complications sound frightening, they're relatively rare when keratitis receives prompt, appropriate treatment from an eye care professional.

Prevention

The best defense against keratitis starts with proper contact lens care if you wear them.
Always wash your hands thoroughly before handling lenses, replace them according to your doctor's schedule, and never sleep in daily-wear contacts.
Use only fresh contact solution - never top off old solution or use tap water to clean your lenses.
Consider switching to daily disposable lenses if you frequently develop eye problems.
Protect your eyes from injury by wearing safety glasses during activities that could generate flying debris, such as yard work, construction, or certain sports.
When swimming, wear goggles to prevent exposure to potentially contaminated water.
If you have dry eyes, use preservative-free artificial tears regularly and consider a humidifier in your home to maintain comfortable moisture levels.
People with a history of cold sores should be especially vigilant about eye hygiene and avoid touching their eyes during outbreaks.
Manage underlying health conditions that increase your risk, and never share eye makeup, towels, or eye drops with others.
If you develop any eye symptoms, resist the urge to rub your eyes, as this can worsen inflammation and introduce bacteria.

Treatment Approaches

Treatment for keratitis depends entirely on the underlying cause, which is why proper diagnosis is so critical.

Treatment for keratitis depends entirely on the underlying cause, which is why proper diagnosis is so critical. Bacterial keratitis requires immediate treatment with antibiotic eye drops, often applied every hour around the clock during the first day or two. Your doctor might prescribe broad-spectrum antibiotics initially, then switch to more targeted medications once culture results identify the specific bacteria.

MedicationAntibiotic

Viral keratitis, particularly when caused by herpes simplex, typically responds to antiviral medications like trifluridine eye drops or oral acyclovir.

Viral keratitis, particularly when caused by herpes simplex, typically responds to antiviral medications like trifluridine eye drops or oral acyclovir. These medications help control the virus and reduce corneal damage. Fungal keratitis proves more challenging, requiring antifungal drops that may need to be used for weeks or months. Some severe fungal infections might even require oral antifungal medications.

Medication

Pain management plays a crucial role in treatment, as keratitis can be extremely uncomfortable.

Pain management plays a crucial role in treatment, as keratitis can be extremely uncomfortable. Your doctor might prescribe pain relievers or recommend cool compresses for relief. However, numbing drops are typically avoided for home use because they can slow healing and mask worsening symptoms. Steroid drops might be used cautiously in certain cases to reduce inflammation, but only after ruling out infection.

Anti-inflammatory

Severe cases that don't respond to medication might require surgical intervention.

Severe cases that don't respond to medication might require surgical intervention. Options include removing damaged tissue, performing a corneal transplant, or using specialized contact lenses to protect the healing cornea. Recent advances include amniotic membrane grafts and regenerative treatments that help promote faster, more complete healing of corneal tissue.

SurgicalMedication

Living With Keratitis

Managing keratitis successfully requires patience and strict adherence to your treatment plan. Take your medications exactly as prescribed, even if your symptoms improve quickly. The full course of treatment is essential to prevent recurrence and complications. Keep all follow-up appointments so your doctor can monitor your healing progress and adjust treatment if needed.

During treatment, protect your affected eye from bright lights by wearing sunglasses, even indoors if necessary.During treatment, protect your affected eye from bright lights by wearing sunglasses, even indoors if necessary. Avoid makeup around the affected eye until your doctor gives the all-clear, and don't wear contact lenses until healing is complete. Many people find that using preservative-free artificial tears helps with comfort during recovery.

Practical daily adjustments can make a significant difference in your comfort anPractical daily adjustments can make a significant difference in your comfort and healing: - Get plenty of rest to support your immune system - Avoid rubbing or touching your eyes - Use cool, clean compresses for pain relief - Take over-the-counter pain relievers as needed - Arrange for help with driving if your vision is significantly affected - Consider working from home if your job involves extensive computer use or exposure to dust and debris

Latest Medical Developments

Latest medical developments are being researched.

Frequently Asked Questions

Can I wear contact lenses while recovering from keratitis?

No, you should avoid contact lenses completely until your eye doctor confirms that your cornea has fully healed. Wearing contacts too soon can delay healing and increase the risk of reinfection.

How long does keratitis typically take to heal?

Healing time varies depending on the cause and severity. Mild cases might improve within a few days, while severe infections can take weeks or months to fully resolve.

Is keratitis contagious?

Keratitis itself isn't contagious, but some underlying causes like viral infections can be. Practice good hygiene, don't share personal items, and avoid close contact during active treatment.

Can I go to work with keratitis?

This depends on your symptoms and job requirements. If you have significant pain, light sensitivity, or vision problems, you may need time off until symptoms improve.

Will my vision return to normal after keratitis?

Most people recover their normal vision with prompt treatment. However, severe cases or delayed treatment can sometimes result in permanent vision changes due to corneal scarring.

Can I drive while being treated for keratitis?

Avoid driving if you have vision problems, severe light sensitivity, or are using medications that cause blurred vision. Wait until your symptoms improve and you feel safe behind the wheel.

Should I use over-the-counter eye drops for keratitis?

Only use eye drops specifically prescribed by your doctor. Some over-the-counter drops can worsen certain types of keratitis or interfere with prescribed medications.

Can keratitis come back after treatment?

Yes, especially viral keratitis can recur. Following prevention strategies and maintaining good eye hygiene can reduce your risk of future episodes.

Is surgery always necessary for keratitis?

No, most cases of keratitis respond well to medication alone. Surgery is typically reserved for severe cases that don't improve with standard treatment or when complications develop.

Can I exercise normally while treating keratitis?

Light exercise is usually fine, but avoid swimming, contact sports, or activities that could expose your eye to dust or debris until your doctor clears you for normal activities.

Update History

Feb 26, 2026v1.1.0

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Feb 25, 2026v1.0.0

Published page overview and treatments by DiseaseDirectory