Retinal Hemorrhage at High Altitude

Abstract

IN July, 1968, retinal disorders were found to have developed in two persons working at 17,500 feet on Mount Logan, Yukon Territory: one of them had papilledema and was semicomatose. In July, 1969, as part of the high-altitude studies conducted by the Arctic Institute in its long-term environmental research program, a pilot study of the retinal circulation was undertaken. The purpose of this communication is to report the frequent occurrence of retinal hemorrhage, often asymptomatic, among persons exposed to high altitude. The only previous mention of this condition that we have found is in the report by Singh et al. . . .