Retinal Vein OcclusionLaser (Nidek® LASER) and /or intravitreal inject.
Arteries carry blood from the heart to other parts of the body, and veins carry the blood back to the heart. A blockage in an artery or vein is called an occlusion or stroke. The eye is often compared to a camera. The front of the eye contains a lens that focuses images on the inside of the back of the eye. This area, called the retina is covered with special nerve cells which convert light into signals that are sent via the optic nerve to the brain, where they are recognized as images. Conditions that affect the retina affect the ability to see.
When a retinal vein is blocked, it cannot drain blood from the retina. This leads to hemorrhages (bleeding) and leakage of fluid from the blocked blood vessels. There are two types of retinal vein occlusion: Central retinal vein occlusion (CRVO) is the blockage of the main retinal vein. Branch retinal vein occlusion (BRVO) is the blockage of one of the smaller branch veins.
Nerve cells need a constant supply of blood to deliver oxygen and nutrients and blood vessels provide this supply. Most people understand what happens in a "stroke”: a small blood clot blocks the flow of blood through one of the arteries in the brain, and the area that is not getting blood becomes damaged. This same type of damage can happen anywhere in the body, not just the brain.