Although there are relatively few cases in the authors' series of tumor of the conjunctiva, they represent the most frequent histopathologic varieties for this localization. It is difficult to treat these patients in such a way as to cure the tumor while preserving intact the eye and vision. Surgery is recommended only in well differentiated cases that are diagnosed early. The excellent physical properties of strontium-90 make it particularly useful for this type of localization. High doses of radiation can be applied to the tumors with little danger to the deep and sensitive structures of the eye. With fractional doses the authors have been able to control conjunctival tumors of considerable size and thickness which would not normally have been considered tributary to this type of therapy.