Retinal artery occlusion is a blockage in one of the small arteries that carry blood to the
Central retinal artery occlusion; Branch retinal artery occlusion; CRAO; BRAO
Causes, incidence, and risk factors
Retinal arteries may become blocked by a
Clots may travel from other parts of the body and block an artery in the retina. The most common sources of clots are the carotid artery in the neck and the heart.
Most clots occur in people with conditions such as:
Carotid artery disease, a condition in which the two large blood vessels in the neck become narrowed or blocked Diabetes
- Heart rhythm problem (
- Heart valve problem
- High levels of fat in the blood (hyperlipidemia)
High blood pressure
- Intravenous drug abuse
Temporal arteritis(damage to arteries due to an immune response)
If a branch of the retinal artery is blocked, part of the retina will not receive enough blood and oxygen. If this happens, you may lose part of your vision.