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Sign

Episcleritis

A usually self-limited inflammation of the superficial tissue overlying the sclera, often seen as localized eye redness.

Found
On eye examination, typically as localized redness of the exposed white of the eye.
Normal
No focal redness or visible inflammation of the superficial tissue over the sclera.
Abnormal
Localized bright-red patch with mild irritation, tenderness, or discomfort; vision is generally preserved and discharge is usually absent.
Suggests
Inflammation of the episcleral tissue; it may be associated with systemic inflammatory or rheumatic disease.

The redness comes from inflammation in the superficial vascular layer between the conjunctiva and sclera. It is generally less painful than inflammation of the deeper sclera, and vision is usually unaffected. In a child being assessed for chronic diarrhea, it is an extraintestinal inflammatory finding to note alongside the bowel history, because systemic inflammatory or rheumatic disease can be involved.

Card id: episcleritis

Sources

  • Episcleritis, Merck Manual Professional Edition, reviewed and updated 2025, https://www.merckmanuals.com/professional/eye-disorders/conjunctival-and-scleral-disorders/episcleritis

Reviewed