endophthalmitis /endof′thalmī″tis/ [Gk, endon + ophthalmos, eye, itis] , an infectious condition of the internal eye in which the primary signs are decreased vision, vitritis, and development of a hypopyon. Patients usually complain of pain. Other symptoms include erythema and edema. It may result from bacterial or fungal infection or from trauma. Depending on the cause, therapy requires surgical intervention or administration of an intraocular antibiotic. Also called endophthalmia.