Retinal vein occlusion occurs when circulation of a retinal vein becomes obstructed by an adjacent blood vessel, causing hemorrhages in the retina. Swelling and ischemia (lack of oxygen) of the retina as well as glaucoma are fairly common complications.
Retinal vein occlusion
The visual symptoms can vary in severity from one person to the next , and are dependent on whether the central retinal vein or a branch retinal vein is involved.
Patients who experience a branch vein occlusion often notice a gradual improvement in their vision as the hemorrhage resolves. Recovery from a central vein occlusion is much less likely since it affects the macula.
This problems appears equally in males and females and is more common after the age of 60.