Carotid artery
The carotid (pronounced ka-rah-tid) arteries are located in your neck and are the main arteries supplying blood to the eyes and brain.
There are two carotid arteries: one on the right side of the neck (which supplies blood to the right side of the brain) and one on the left side of the neck (which supplies blood to the left side of the brain).
When blood flowing through the carotid artery is reduced or blocked, the eyes and brain do not receive enough oxygen. As a result, brain function and vision can be greatly affected.
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Carotid Artery