What is branch retinal vein occlusion (BRVO)?

Retinal vein occlusion (RVO) is the second most common cause of vision loss from diseases that affect the blood vessels in the retina. BRVO is the most common form of RVO.

What is BRVO?-Click to watch a video about branch retinal vein occlusion.
  • When a retinal vein occlusion (RVO) happens, it means a vein that carries blood away from the retina of your eye has become blocked
  • With BRVO, the blockage occurs in a tiny blood vessel that “branches” from the main vein in the retina, causing bleeding and leakage of fluid
  • The blockage caused by BRVO can cause fluid to leak into the macula, causing it to swell. This is called macular edema. It can lead to blurred vision and sometimes complete vision loss
  • The macula is the part of the retina in the back of the eye that helps you see small details, like threading a needle or reading small print
  • Atherosclerotic plaques in the arteries of the eye can cause them to harden. This can put pressure on the veins that cross under the arteries. The veins may become blocked and blood may not flow through them