A group of patients is described in whom choroidal detachment was superimposed on retinal detachment. The prominent external signs are severe iritis and profound hypotony. The configuration of the choroidal detachment is variable, and changes in the course of several days. As the choroidal detachment subsides, the retinal detachment increases. The necessity for careful diagnonosis, and the frequency of misdiagnoses, are stressed. Definitive surgery should be postponed until the choroidal fluid has cleared, but even then the prognosis for reattachment is poorer than in uncomplicated retinal detachment.