Definition: Central retinal vein occlusion (CRVO) is an eye condition that affects the retina — the light-sensitive layer of tissue in the back of your eye. It happens when a blood clot blocks the main vein where blood flows out of the retina. It usually only affects 1 eye.

Category: eye condition

Credit: National Eye Institute

Source: https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/central-retinal-vein-occlusion-crvo