eye disorders
Blockage of Central Retinal Veins and Branch Retinal Veins
Prognosis
How much vision people retain depends mainly on two things: Whether the blockage affected the central retinal vein or a branch Sharpness of vision (visual acuity) at the time of the blockage Most people have some permanent loss of vision. If the visual acuity is good at the time of retinal vein blockage (usually when only a branch is blocked), it will likely remain good, occasionally near normal. If the visual acuity is poor (for example, worse than 20/200), it will remain poor or worsen in 80% of people. Blockage of the central retinal vein rarely recurs. 