4 cases in which type 10 adenovirus was isolated are described in connection with a new form of viral keratoconjunctivitis. The predominant symptoms, after disappearance of the benign-type conjunctivitis signs by the 5th day, are those of edema of the lids, chemosis, multiple corneal erosions and folds in Descemet's membrane, reaching their maxima by the 15th day. The course of the disease is of roughly 30 days.