What Are Scleritis and Episcleritis
Scleritis and episcleritis are inflammatory conditions that affect the outer protective layers of the eye. Although they share some similarities in appearance, they differ significantly in severity, underlying causes, and treatment needs. Understanding these differences is important for knowing when to seek prompt evaluation and care.
The sclera is the thick, white outer coat of the eye that provides structural support and protection. It extends from the cornea at the front of the eye to the optic nerve at the back. The episclera is a thin layer of tissue that sits on top of the sclera, containing a network of small blood vessels that help nourish the eye's surface.
Episcleritis involves inflammation of the episclera, the superficial tissue layer covering the sclera. This condition tends to be mild and self-limiting, meaning it often resolves on its own within a few weeks. While episcleritis can cause redness and mild discomfort, it rarely threatens vision or leads to serious complications. Many patients experience episodes that come and go, with periods of quiet between flare-ups.
Episcleritis presents in two main forms. Simple episcleritis is the more common type and causes a diffuse area of redness, while nodular episcleritis produces a small, raised bump on the surface of the eye. Both forms are generally manageable with supportive care, though some patients benefit from treatment to reduce discomfort during active episodes.
Scleritis is inflammation of the sclera itself, the deeper structural layer of the eye. This condition is considerably more serious than episcleritis and requires prompt medical attention. Scleritis can cause significant pain, and if left untreated, it may lead to thinning of the scleral tissue, vision changes, and other complications that can affect long-term eye health.
Because scleritis often has connections to systemic autoimmune diseases, its evaluation and management may involve coordination between eye care specialists and other medical providers. Recognizing the signs of scleritis early and seeking timely evaluation can make a meaningful difference in outcomes.
While both conditions can cause a red, uncomfortable eye, the treatment approach and urgency differ substantially. Episcleritis is generally a benign condition that responds well to conservative measures. Scleritis, on the other hand, may signal an underlying systemic disease and can cause lasting damage to the eye if not properly treated. At Washington Eye Institute, our diagnostic capabilities allow for thorough evaluation to determine which condition is present and guide appropriate care.
Types and Classifications
Episcleritis is classified into two primary forms based on clinical appearance. Each type has a characteristic presentation that helps guide evaluation.
- Simple episcleritis causes sectoral or diffuse redness across the surface of the eye without a distinct focal point of swelling
- Nodular episcleritis produces a well-defined, slightly elevated nodule on the eye's surface that is tender to touch
Both forms of episcleritis tend to be self-limiting and carry a favorable outlook. Episodes may recur in some patients, but serious complications are uncommon.
Diffuse anterior scleritis is the most common form of scleritis. It involves widespread inflammation across the front portion of the sclera, producing deep redness and significant discomfort. The redness in diffuse anterior scleritis has a characteristic violaceous, or bluish-red, hue that helps distinguish it from the brighter redness seen in episcleritis or conjunctivitis.
Nodular anterior scleritis produces one or more firm, tender nodules within the scleral tissue. These nodules are immovable, unlike the more superficial bumps seen in nodular episcleritis. Patients with nodular anterior scleritis typically experience well-localized pain and tenderness at the site of the nodule.
Necrotizing scleritis is the most severe form of the disease. It involves active destruction of scleral tissue and carries the highest risk of complications, including scleral thinning and perforation. This form is strongly associated with underlying systemic autoimmune conditions and requires aggressive treatment. A rare variant, necrotizing scleritis without inflammation (sometimes called scleromalacia perforans), can occur in patients with long-standing rheumatoid arthritis and may progress with little pain despite significant tissue damage.
Posterior scleritis affects the back portion of the sclera, behind the equator of the eye. Because this inflammation occurs in a location that is not directly visible during a standard external examination, it can be more challenging to diagnose. Posterior scleritis may cause pain with eye movement, changes in vision, and swelling around or behind the eye. Specialized imaging, such as ocular ultrasound, is often needed to confirm the diagnosis.
Recognizing Symptoms and Seeking Care
Episcleritis symptoms tend to develop gradually and are generally mild compared to scleritis. Patients can usually continue their daily activities with minimal disruption.
- Mild discomfort or a gritty sensation in the affected eye
- Localized or diffuse redness on the eye's surface
- Slight tenderness when touching the eye through the eyelid
- Occasional tearing or watery eyes
- Mild sensitivity to light in some cases
One helpful characteristic of episcleritis is that the redness and discomfort tend to fluctuate and may resolve within a few days to weeks, even without treatment. The pain, when present, is typically described as a mild ache rather than a deep, intense pain.
Scleritis symptoms are typically more pronounced and persistent than those of episcleritis. The pain associated with scleritis is one of its defining features.
- Deep, boring, or piercing eye pain that may radiate to the forehead, jaw, or temple
- Pain that worsens at night and may disturb sleep
- Pain that intensifies with eye movement
- Severe redness with a characteristic bluish or violaceous tint
- Tenderness when pressing on the eye
- Tearing and light sensitivity
- Possible changes in vision, particularly with posterior scleritis or severe anterior disease
The pain of scleritis is often described as constant and relentless, distinguishing it from the intermittent, milder discomfort of episcleritis. Patients frequently report that the pain is the most bothersome aspect of the condition and is what prompts them to seek care.
Certain signs and symptoms warrant prompt evaluation by an eye care specialist. If you experience any of the following, consider scheduling an urgent appointment at Washington Eye Institute.
- Severe eye pain, especially if it is deep, constant, or wakes you from sleep
- Significant eye redness that does not improve with over-the-counter eye drops
- Pain accompanied by changes in vision, such as blurriness or dimming
- Eye redness and pain in the setting of a known autoimmune condition
- Recurrent episodes of eye redness and discomfort
Early evaluation helps ensure accurate diagnosis and timely treatment, which is particularly important for scleritis. Washington Eye Institute offers multiple locations in Greenbelt, Rockville, and Cumberland, Maryland, providing convenient access for patients who need urgent eye care.
A red, painful eye can result from many different conditions, including conjunctivitis, uveitis, acute glaucoma, and corneal problems. Scleritis and episcleritis have distinguishing features that a thorough clinical examination can identify. The pattern of redness, the depth and character of pain, the response to certain eye drop tests, and the presence or absence of other ocular findings all help guide the diagnosis. Because treatment differs significantly depending on the underlying cause, accurate diagnosis is essential.
Causes and Associated Conditions
Scleritis is frequently associated with underlying systemic autoimmune conditions. In many cases, scleritis may be the first sign that an autoimmune disease is present, making a thorough medical workup an important part of the evaluation process.
- Rheumatoid arthritis is one of the most common systemic conditions associated with scleritis
- Granulomatosis with polyangiitis (formerly known as Wegener granulomatosis) can cause severe forms of scleritis
- Systemic lupus erythematosus may be associated with scleral inflammation
- Inflammatory bowel disease, relapsing polychondritis, and other connective tissue disorders have also been linked to scleritis
The connection between scleritis and systemic disease underscores the importance of a comprehensive evaluation. When scleritis is diagnosed, your eye care team may recommend blood tests and other studies to look for underlying conditions that may require their own management.
While autoimmune-related scleritis is more common, infections can also cause scleral inflammation. Infectious scleritis may develop after eye surgery, trauma, or spread from an adjacent infection. Bacterial, viral, and fungal organisms have all been identified as potential causes. Identifying an infectious cause is critical because the treatment approach differs from autoimmune scleritis, and using immunosuppressive therapy for an infection could worsen the condition.
In some patients, no underlying systemic disease or infectious cause is identified despite thorough investigation. These cases are termed idiopathic, meaning the exact trigger remains unknown. Even in idiopathic cases, ongoing monitoring is recommended because an associated systemic condition may become apparent over time.
Episcleritis has a weaker association with systemic disease compared to scleritis. Many episodes of episcleritis occur without any identifiable underlying cause. However, recurrent or persistent episcleritis may occasionally be linked to autoimmune conditions, and your provider may recommend additional evaluation if episodes are frequent or do not follow the expected pattern of self-resolution.
How Diagnosis Works
The diagnostic process for scleritis and episcleritis begins with a detailed clinical examination. Your eye care provider will review your symptoms, including the nature and duration of your pain, the pattern of redness, and any associated visual changes. A careful external examination of the eye helps assess the depth and distribution of inflammation.
One clinical technique involves instilling a drop of phenylephrine, a mild vasoconstricting agent, onto the eye's surface. In episcleritis, the superficial blood vessels blanch (whiten) with this drop, while the deeper scleral vessels in scleritis do not. This simple test can help distinguish between the two conditions at the bedside.
A slit-lamp examination is a key part of the evaluation. This specialized microscope allows the provider to examine the eye's structures in fine detail using a focused beam of light. During the slit-lamp exam, the provider can assess the depth of vascular engorgement, look for scleral nodules or areas of thinning, evaluate the cornea for related changes, and check the anterior chamber for signs of associated intraocular inflammation.
For cases where posterior scleritis is suspected, ocular ultrasound (B-scan ultrasonography) is a valuable diagnostic tool. This imaging study can reveal characteristic findings such as thickening of the scleral wall and fluid accumulation behind the eye. In some cases, optical coherence tomography (OCT) or magnetic resonance imaging (MRI) may provide additional information. Washington Eye Institute's comprehensive diagnostic equipment supports thorough evaluation of both straightforward and complex presentations.
When scleritis is diagnosed, a laboratory workup is typically recommended to evaluate for systemic autoimmune or inflammatory diseases. This may include blood tests such as a complete blood count, inflammatory markers (erythrocyte sedimentation rate and C-reactive protein), rheumatoid factor, antinuclear antibody panel, and antineutrophil cytoplasmic antibody testing. The specific tests ordered will depend on your clinical presentation and medical history. This workup plays an important role in identifying conditions that may need treatment beyond the eye itself.
Treatment Approaches
Treatment for episcleritis is guided by the severity of symptoms. Because the condition is self-limiting in most cases, treatment focuses on comfort measures during active episodes.
- Cool compresses and chilled artificial tears may provide relief for mild discomfort
- Oral nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen can help reduce inflammation and pain in more bothersome episodes
- Topical NSAID eye drops may be considered in select cases
- Topical corticosteroid eye drops are reserved for cases that do not respond to other measures, used cautiously and for limited durations
Most episodes of episcleritis resolve within a few weeks. Your provider can help you develop a management plan that addresses your specific symptoms while minimizing unnecessary medication use.
Scleritis requires more aggressive treatment than episcleritis due to its potential for serious complications. The goal of treatment is to control inflammation, reduce pain, and prevent tissue damage.
- Oral NSAIDs are often the first line of treatment for mild to moderate diffuse or nodular anterior scleritis
- Oral corticosteroids (such as prednisone) may be prescribed when NSAIDs are insufficient to control inflammation
- Immunosuppressive medications may be introduced for patients who require long-term inflammation control, who have necrotizing disease, or who cannot tolerate corticosteroids
- Biologic agents may be considered in refractory cases where other treatments have not achieved adequate control
Treatment decisions are individualized based on the type and severity of scleritis, the presence of underlying systemic disease, and each patient's overall health profile. Close follow-up is important to monitor the response to treatment and adjust the plan as needed.
Necrotizing scleritis and posterior scleritis represent more severe forms of the disease that typically require more intensive treatment. Immunosuppressive therapy is often initiated early in these cases to prevent progressive tissue damage. Patients with necrotizing scleritis are at higher risk for scleral perforation and vision loss, making timely and coordinated care essential. Posterior scleritis may also require treatment directed at associated complications such as retinal detachment or optic nerve swelling.
When scleritis is associated with an underlying autoimmune condition, effective management of the systemic disease is a critical component of treatment. This often involves collaboration between eye care specialists and rheumatologists or other medical providers. Controlling the underlying disease can help reduce the frequency and severity of scleral inflammation and improve overall health outcomes.
Both scleritis and episcleritis benefit from appropriate follow-up care. For episcleritis, follow-up helps confirm resolution and monitor for any progression. For scleritis, regular monitoring is essential to assess treatment response, watch for complications, and adjust medications as needed. Your provider will recommend a follow-up schedule based on the severity of your condition and your treatment plan.
What to Expect During Your Visit
When you visit Washington Eye Institute for evaluation of a red, painful eye, the process begins with a thorough review of your symptoms and medical history. You will be asked about the onset, duration, and character of your eye pain, any associated symptoms such as vision changes or light sensitivity, and whether you have any known medical conditions, particularly autoimmune or inflammatory diseases.
Your provider will then perform a comprehensive eye examination, including visual acuity testing, slit-lamp examination, and assessment of eye pressure. Depending on the initial findings, additional testing such as ocular ultrasound or laboratory studies may be recommended.
After completing the evaluation, your provider will discuss the diagnosis with you in detail. You will learn whether your condition is episcleritis or scleritis, what type is present, and what this means for your care. Your provider will explain the distinction between these conditions in terms you can understand and will take time to address your questions and concerns.
Your treatment plan will be tailored to your specific diagnosis and individual circumstances. For episcleritis, this may involve recommendations for comfort measures and a plan for follow-up. For scleritis, your provider will discuss medication options, the potential need for laboratory testing to evaluate for underlying conditions, and the importance of regular monitoring. You will receive clear instructions about your medications, warning signs to watch for, and when to return for follow-up.
If your evaluation suggests an underlying systemic condition, your eye care team at Washington Eye Institute can help coordinate referrals to appropriate specialists, such as a rheumatologist. This collaborative approach helps ensure that both your eye condition and any related systemic disease receive comprehensive attention. With locations in Greenbelt, Rockville, and Cumberland, Maryland, access to follow-up care and coordination is convenient for patients throughout the region.
Your Path Through Evaluation and Treatment
The first step in your journey is recognizing that your symptoms warrant professional evaluation. If you are experiencing persistent eye redness, deep eye pain, or discomfort that is not improving with basic home measures, scheduling an appointment is an important decision. Patients with known autoimmune conditions should be particularly attentive to new eye symptoms, as these may signal scleral inflammation that benefits from early intervention.
During your visit, the diagnostic assessment will determine whether your condition is episcleritis, scleritis, or another cause of eye redness and pain. This step involves the clinical examination, slit-lamp evaluation, and any additional imaging or laboratory testing needed to reach an accurate diagnosis. Washington Eye Institute's fellowship-trained specialists and diagnostic equipment support thorough evaluation across a range of ocular inflammatory conditions.
Once your diagnosis is established, treatment begins promptly. For episcleritis, this may be as straightforward as using cool compresses and oral anti-inflammatory medication. For scleritis, treatment may involve prescription medications that require careful monitoring. Your provider will explain the expected timeline for improvement and what to do if your symptoms change or worsen.
Follow-up visits allow your provider to assess how well the treatment is working and make adjustments as needed. For patients with scleritis, ongoing monitoring helps detect any complications early and ensures that the treatment plan continues to meet your needs. If an underlying systemic condition is identified, coordinated care with other specialists helps provide a comprehensive approach to your health.
For patients with episcleritis, the long-term outlook is generally very favorable. Most patients experience occasional episodes that resolve without lasting effects. For patients with scleritis, long-term management may involve ongoing medication and regular eye examinations to maintain eye health and prevent recurrence. Your care team will work with you to develop a sustainable plan that supports your vision and overall well-being over time.
Questions and Answers
While both conditions cause eye redness, the key distinguishing feature is the nature of the pain. Scleritis typically produces deep, boring pain that may radiate to surrounding areas of the face and can worsen at night or with eye movement. Episcleritis causes milder discomfort, often described as a slight ache or irritation. The pattern of redness also differs: scleritis tends to produce a deeper, bluish-red discoloration, while episcleritis causes brighter, more superficial redness. However, a clinical examination by an eye care specialist is the most reliable way to distinguish between the two conditions, as some presentations can overlap.
Episcleritis is generally considered a benign, self-limiting condition. It can cause discomfort and cosmetic concern due to redness, but it rarely leads to vision loss or serious complications. Most episodes resolve within a few weeks, and treatment focuses primarily on symptom relief. However, if you experience recurrent episodes or symptoms that seem more severe than expected, it is worth having an evaluation to rule out scleritis or an underlying condition that may need attention.
Scleritis has the potential to affect vision, particularly if it is left untreated or if a severe form such as necrotizing or posterior scleritis is present. Complications that can lead to vision changes include scleral thinning, corneal involvement, cataract development, glaucoma, and retinal problems. Prompt diagnosis and appropriate treatment are important for reducing the risk of these complications. With timely care, many patients with scleritis maintain good visual outcomes.
Scleritis is frequently linked to underlying systemic autoimmune or inflammatory conditions. Blood tests help identify whether such a condition is present, even if you have not previously been diagnosed with one. Identifying an underlying disease is important because it may require its own treatment, and managing the systemic condition can help control the scleral inflammation. Common tests include inflammatory markers, rheumatoid factor, antinuclear antibodies, and other studies tailored to your clinical picture. Think of these tests as an important part of understanding the full scope of your health.
The duration of treatment for scleritis varies depending on the type and severity of the condition, the underlying cause, and the individual's response to therapy. Mild cases of anterior scleritis treated with oral anti-inflammatory medications may improve within several weeks. More severe cases or those associated with systemic disease may require longer courses of treatment, including immunosuppressive medications that are used over months or longer. Your provider will discuss expected timelines and will monitor your progress to determine when medications can be tapered or adjusted.
For a painful red eye that you suspect may be scleritis, seeing an eye care specialist is generally the most appropriate course of action, as the evaluation requires specialized equipment such as a slit-lamp microscope. If you are unable to see an eye specialist promptly and your symptoms are severe, an emergency room visit can help rule out other urgent conditions and provide initial pain management. Washington Eye Institute offers urgent access across our Greenbelt, Rockville, and Cumberland locations, so patients in the region can receive specialized evaluation without the delays that may occur in a general emergency setting. Contacting our office to describe your symptoms can help determine the most appropriate timing for your visit.