Fig. 33. Cystoid macular edema due to preretinal gliosis. A. Preretinal gliotic membrane has stretched retinal vessels, particularly nasally, toward the central macula. There is telangiectasia of the perifoveal capillaries and some early leakage superotemporally. B. Lat-phase photograph reveals cystoid accumulation of fluorescein. (Courtesy of Dr. Kenneth G. Noble.)