Why is my eye red?

Episcleritis is a relatively common, benign cause of red eye, due to inflammation of the episcleral tissues. Nodular episcleritis is characterized by a clearly defined elevated area of inflammation. In simple episcleritis, vascularization is present without an obvious nodule.

Differentials include: scleritis (inflammation goes deeper in the tissues and is much more serious), allergic conjunctivitis, and uveitis.

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