Episcleritis

ByZeba A. Syed, MD, Wills Eye Hospital
Reviewed/Revised Apr 2023
View Patient Education

    Episcleritis is self-limiting, recurring, usually idiopathic inflammation of the episcleral tissue that does not threaten vision. Symptoms are a localized area of hyperemia of the globe, irritation, and lacrimation. Diagnosis is clinical. Treatment is symptomatic.

    The episclera is a thin vascular membrane between the conjunctiva and the sclera.

    Episcleritis occurs in young adults, more commonly among women. It is usually idiopathic; it can be associated with connective tissue diseases and rarely with serious systemic diseases (present in about 15% of patients). (See also Overview of Conjunctival and Scleral Disorders.)

    Mild irritation occurs. Additionally, a bright red patch is present just under the bulbar conjunctiva (simple episcleritis). A hyperemic, edematous, raised nodule (nodular episcleritis) may also be present. The palpebral conjunctiva is normal.

    Episcleritis is distinguished from conjunctivitis by hyperemia localized to a limited area of the globe, much less lacrimation and no discharge. It is distinguished from scleritis by lack of photophobia and lack of severe pain.

    The condition is self-limited. If the review of systems does not suggest an underlying cause, unless the episode recurs, then a diagnostic assessment for systemic disorders is not routinely warranted.

    Drugs Mentioned In This Article
    quizzes_lightbulb_red
    Test your KnowledgeTake a Quiz!
    Download the free Merck Manual App iOS ANDROID
    Download the free Merck Manual App iOS ANDROID
    Download the free Merck Manual App iOS ANDROID