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Seven cases of orbital tumors are here reported. Three of these are described, with histological confirmation of the diagnosis, as instances of adenocarcinoma of the lacrimal gland, pseudotumor, and perineural fibroblastoma of the optic nerve. From the Department of Ophthalmology, Washington University School of Medicine. Read before the St. Louis Ophthalmic Society, January 27, 1933.

While conservative treatment resulted in slight improvement in the visual acuity, rapid betterment and ultimate normal vision followed the removal of infected tissue from the maxillary sinus. It is fair to conclude that the infection within the antrum was the cause of the optic neuritis. Conservative measures should be instituted while the search for foci of infection is progressing but once a focus is definitely established it must be eliminated without delay. Careful investigation and planning should precede nasal surgery.