Episcleritis

Episcleritis mimics conjunctivitis in appearance but causes much less tearing and exudate and scleritis also causes pain. The ocular hyperemia of episcleritis involves only a segment of the globe, not the whole bulbar and palpebral conjunctiva as occurs in conjunctivitis.

Image courtesy of the Ophthalmic Clinic of the Health Center of the University of Erlangen-Nürnberg, via the Online Journal of Ophthalmology (www.onjoph.com).