non-perfusion

Fluorescein angiography demonstrated normal arteriovenous flow, without capillary non-perfusion, vessel or disc leakage.

Coats' disease is an exudative detachment of the retina, associated with vascular abnormalities including telangiectatic vessels, microaneurysms, areas of non-perfusion, and saccular venous dilatations.

Fundus Fluorescein angiography (FFA): This is an imaging technique which relies on the circulation of Fluorescein dye to show staining, leakage, or non-perfusion of the retinal and choroidal vasculature.