A FAIRLY common complaint of patients seen by the ophthalmologic service in the theater of operation is poor night vision. It constitutes a considerable problem both from a diagnostic and from a therapeutic standpoint. During the summer of 1944 my associates and I carried out a study of a group of United States soldiers under the direction of Major Trygve Gunderson, ophthalmologic consultant for the armed forces of the United States in the Mediterranean Theater. At this time we were fortunate to have placed at our disposal the equipment of the department of ophthalmology of the University of Rome, and generous help was given by staff members, especially Prof. Giambattista Bietti, on leave from the University of Sassari, Sardinia.
The following paper is a report of the observations on this group.
All patients were given a careful ophthalmologic examination, including determination of visual acuity, cycloplegic refraction, funduscopic study, examination