Central retinal artery occlusion, also is known as CRAO, occurs when the flow of blood through the central retinal artery is blocked. The central retinal artery is vital to the eye; it provides nutrients to the retina and the optic nerve. When a blockage occurs, numerous detrimental effects can follow, such as painless, sudden, and severe vision loss, which can be permanent.
Strokes can occur anywhere in the body when that area is cut off from nutrients and oxygen brought by the blood. Several other conditions can precede CRAO, such as high blood pressure, artery disease, or heart problems.
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