Episcleritis
Episcleritis is usually self-limiting inflammation of the superficial episclera, causing a sectoral or diffuse red eye with mild aching and preserved vision; its key clinical task is to exclude the painful, potentially sight-threatening deep inflammation of scleritis.
Definition
Episcleritis is usually self-limiting inflammation of the episcleral vascular connective tissue between conjunctiva and sclera. It causes sectoral or diffuse redness, mild discomfort and preserved vision and is distinguished from deeper, potentially sight-threatening scleritis.
First principles
Superficial inflammation usually preserves vision
The episclera lies between conjunctiva and sclera. Inflammation of its superficial vessels causes a localised or diffuse red eye, irritation, aching or tenderness without primary involvement of the cornea, anterior chamber or optic structures, so visual acuity is usually preserved.
This page is exam revision material, not medical advice, and must not be used for patient care. Always check drug doses against the BNF and current guidance. Full disclaimer.