Uveitis: Symptoms, Causes, Treatment, and Management

Overview

Uveitis (pronounced you-vee-EYE-tis) is a form of eye inflammation that affects the uvea, the middle layer of tissue in the eye wall. The uvea consists of the iris (colored part of the eye), ciliary body (muscles and blood vessels behind the iris), and choroid (vascular layer beneath the retina). Uveitis can cause swelling and destroy eye tissues, potentially leading to vision loss if not treated promptly.

This condition can affect people of all ages, including children, but it most commonly occurs in individuals between 20 and 60 years old. According to the National Eye Institute (NEI), uveitis is responsible for approximately 10% of blindness cases in the United States. Globally, it accounts for about 5-10% of all cases of blindness, per the World Health Organization (WHO).

Uveitis can be classified based on the part of the uvea it affects:

• Anterior uveitis: Inflammation of the iris (iritis) or iris and ciliary body (iridocyclitis). This is the most common type, accounting for 75% of cases.
• Intermediate uveitis: Inflammation of the ciliary body and the jelly-like substance in the eye's center (vitreous). Also called pars planitis, cyclitis, or vitritis.
• Posterior uveitis: Inflammation of the choroid (choroiditis), retina (retinitis), or optic nerve (neuroretinitis).
• Panuveitis: Inflammation affecting all parts of the uvea.

Symptoms

Symptoms of uveitis can develop suddenly and worsen quickly, though in some cases, they may develop gradually. Symptoms can affect one or both eyes and may include:

Common Symptoms

• Eye redness: The eye may appear pink or red due to dilated blood vessels.
• Eye pain: A dull ache or sharp pain, often worse when focusing. Pain may be constant or come and go.
• Light sensitivity (photophobia): Discomfort or pain in bright light.
• Blurred vision: Vision may become cloudy or hazy, sometimes with a noticeable decrease in sharpness.
• Floaters: Small, dark shapes or spots that drift across your field of vision.
• Decreased vision: Partial or complete loss of vision in severe cases.

Less Common Symptoms

• Headaches: Often accompanying eye pain.
• Small or irregularly shaped pupil: Due to inflammation affecting the iris.
• Excessive tearing: The eye may water more than usual.
• White or cloudy discharge: More common in infectious causes.

Symptoms can vary depending on the type of uveitis:

• Anterior uveitis typically causes redness, pain, and light sensitivity.
• Intermediate and posterior uveitis are often painless but may cause floaters and blurred vision.
• Panuveitis can cause a combination of all symptoms.

Causes and Risk Factors

Uveitis can have infectious or non-infectious causes. In many cases, the exact cause is unknown (idiopathic).

Infectious Causes

Infections that can lead to uveitis include:

• Viruses: Herpes simplex virus (HSV), varicella-zoster virus (VZV), cytomegalovirus (CMV), and HIV.
• Bacteria: Tuberculosis (TB), syphilis, Lyme disease, and leptospirosis.
• Fungi: Histoplasmosis, candidiasis, and aspergillosis.
• Parasites: Toxoplasmosis (most common infectious cause worldwide), toxocariasis, and onchocerciasis.

Non-Infectious Causes

Autoimmune and inflammatory disorders are common non-infectious causes:

• Autoimmune diseases: Ankylosing spondylitis, rheumatoid arthritis, psoriatic arthritis, and systemic lupus erythematosus (SLE).
• Inflammatory bowel disease (IBD): Crohn’s disease and ulcerative colitis.
• Sarcoidosis: An inflammatory disease affecting multiple organs.
• Behçet’s disease: A rare condition causing inflammation in blood vessels.
• Vogt-Koyanagi-Harada (VKH) syndrome: A rare disorder affecting melanin-producing cells.
• Eye trauma or surgery: Injury or complications from eye procedures.
• Cancer: Rarely, uveitis can be associated with eye cancers like lymphoma.

Risk Factors

Factors that may increase your risk of developing uveitis include:

• Having an autoimmune or inflammatory disorder.
• Smoking or using tobacco products.
• Recent eye injury or surgery.
• Infections like HIV/AIDS, herpes, or tuberculosis.
• Genetic predisposition (e.g., HLA-B27 gene).
• Use of certain medications (rare).

Diagnosis

Diagnosing uveitis involves a comprehensive eye exam and possibly additional tests to determine the underlying cause. An ophthalmologist (eye specialist) will typically:

Eye Examination

• Visual acuity test: Measures how well you can see at various distances.
• Slit-lamp examination: Uses a microscope and light to examine the front and back of the eye.
• Ophthalmoscopy: Examines the retina and optic nerve using a lighted instrument.
• Tonometer test: Measures pressure inside the eye (intraocular pressure).

Additional Tests

If an underlying condition is suspected, your doctor may recommend:

• Blood tests: To check for infections (e.g., syphilis, Lyme disease) or autoimmune disorders (e.g., rheumatoid factor, HLA-B27).
• Imaging tests: Chest X-ray (for sarcoidosis or tuberculosis), CT scan, or MRI.
• Eye fluid analysis: Aqueous or vitreous humor may be tested for infection or cancer cells.
• Skin tests: Such as a tuberculosis skin test (PPD) or test for toxoplasmosis.

In some cases, a biopsy of eye tissue may be necessary to confirm a diagnosis, especially if cancer is suspected.

Treatment Options

Treatment for uveitis aims to reduce inflammation, relieve pain, prevent tissue damage, and restore vision. The approach depends on the type and severity of uveitis, as well as the underlying cause.

Medications

• Corticosteroids: The primary treatment for uveitis. These can be administered as:
  • Eye drops (e.g., prednisolone acetate) for anterior uveitis.
  • Oral tablets (e.g., prednisone) for intermediate, posterior, or severe uveitis.
  • Injections (around or into the eye) for persistent or severe cases.
  • Intravenous (IV) steroids for sight-threatening uveitis.
• Immunosuppressants: Used if corticosteroids are ineffective or if long-term treatment is needed. Examples include:
  • Methotrexate
  • Azathioprine
  • Mycophenolate mofetil
  • Cyclosporine
• Biologic therapies: Target specific parts of the immune system. Examples include:
  • Adalimumab (Humira)
  • Infliximab (Remicade)
• Antiviral or antibiotic medications: If an infection is the cause (e.g., acyclovir for herpes, antibiotics for syphilis).
• Eye drops to dilate the pupil: Such as atropine or homatropine, to reduce pain and prevent complications like synechiae (iris sticking to the lens).
• Eye drops to reduce eye pressure: If glaucoma develops as a complication.

Procedures and Surgeries

In severe or chronic cases, the following procedures may be necessary:

• Vitrectomy: Surgical removal of the vitreous gel to treat posterior uveitis or complications like retinal detachment.
• Implantable drug devices: Such as a fluocinolone acetonide implant (Retisert) or dexamethasone implant (Ozurdex), which release medication slowly over time.
• Laser therapy: To treat complications like retinal tears or swelling.
• Cataract surgery: If cataracts develop due to chronic inflammation or steroid use.

Lifestyle and Home Remedies

While medical treatment is essential, the following tips can help manage symptoms:

• Wear dark sunglasses to reduce light sensitivity.
• Use artificial tears to relieve dryness or discomfort.
• Avoid driving or operating machinery if vision is blurred.
• Protect your eyes from injury (e.g., wear safety goggles during sports or hazardous activities).
• Manage stress, as it can worsen autoimmune-related uveitis.

Living with Uveitis

Uveitis is often a chronic condition, meaning it may require long-term management. Here are some tips for daily living:

Medication Management

• Take medications exactly as prescribed. Do not stop or adjust doses without consulting your doctor.
• Use a pill organizer or set reminders to stay on track with oral medications.
• Store eye drops properly and check expiration dates.
• Wash your hands before applying eye drops to prevent infection.

Monitoring Your Condition

• Attend all follow-up appointments with your ophthalmologist.
• Keep a symptom diary to track flare-ups, triggers, and responses to treatment.
• Monitor your vision regularly using an Amsler grid (a tool to detect vision changes).

Lifestyle Adjustments

• Diet: Eat a balanced diet rich in antioxidants (e.g., leafy greens, berries) and omega-3 fatty acids (e.g., fish, flaxseeds) to support eye health.
• Exercise: Regular physical activity can help reduce inflammation and improve overall health.
• Sleep: Aim for 7-9 hours of quality sleep per night to support immune function.
• Smoking cessation: Smoking can worsen uveitis and increase the risk of complications.

Emotional Support

• Join a support group for people with uveitis or chronic eye conditions (e.g., Uveitis.org).
• Talk to a mental health professional if you feel anxious or depressed about your condition.
• Educate family and friends about uveitis so they can offer support.

Prevention

While not all cases of uveitis can be prevented, you can reduce your risk by:

• Managing underlying conditions: Work with your healthcare provider to control autoimmune diseases or infections.
• Practicing good hygiene: Wash your hands regularly to avoid infections that could lead to uveitis.
• Protecting your eyes: Wear safety goggles during activities that could cause eye injury.
• Avoiding smoking: Smoking is a significant risk factor for uveitis and other eye diseases.
• Getting vaccinated: Stay up-to-date on vaccines to prevent infectious causes (e.g., herpes zoster vaccine for shingles).
• Eating a healthy diet: A diet rich in fruits, vegetables, and healthy fats supports immune function and eye health.

Complications

If left untreated, uveitis can lead to serious complications, some of which may cause permanent vision loss. Potential complications include:

• Glaucoma: Increased pressure in the eye due to inflammation or steroid use, which can damage the optic nerve.
• Cataracts: Clouding of the eye's lens, often accelerated by long-term steroid use.
• Retinal detachment: Separation of the retina from the back of the eye, requiring emergency surgery.
• Macular edema: Swelling of the retina's central area (macula), leading to blurred or distorted vision.
• Optic nerve damage: Can result in permanent vision loss.
• Posterior synechiae: Scarring that causes the iris to stick to the lens, leading to pupil irregularities.
• Band keratopathy: Calcium deposits on the cornea, causing vision problems.
• Chronic recurrence: Uveitis may return, especially if the underlying cause is not addressed.

Early diagnosis and treatment are critical to preventing these complications. Regular follow-ups with an ophthalmologist can help monitor and manage the condition effectively.

When to Seek Emergency Care

Resources and Support

For more information about uveitis, visit these reputable sources:

• National Eye Institute (NEI) - Uveitis
• Mayo Clinic - Uveitis
• American Academy of Ophthalmology (AAO) - Uveitis
• Uveitis.org
• Centers for Disease Control and Prevention (CDC) - Vision Health

If you suspect you have uveitis, schedule an appointment with an ophthalmologist promptly. Early intervention can help preserve your vision and improve your quality of life.