Dacryocystitis

Dacryocystitis is infection of the lacrimal sac, usually secondary to nasolacrimal duct obstruction. This image shows acute dacryocystitis; chronic dacryocystitis manifests as a mass with signs of chronic conjunctivitis.

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