What Are The Signs Of Subclavian Steal Syndrome?

Double Vision

Double vision may manifest in subclavian steal syndrome patients. Double vision is best described as when an individual sees two images of the same object when they should only be seeing one. The images the individual is seeing can be on top of one another, side by side, or both. Double vision in patients with subclavian steal syndrome typically occurs in both eyes or is binocular. The reduced blood supply to the brain can cause tissues located in the parietal lobe and the occipital lobe to shut down or begin to die. The occipital lobe is responsible for taking visual information from nerve signals and creating an image in the brain. The parietal lobe controls many functions, including that of perception, which can alter the way the eyes work. Oxygen deprivation from poor blood supply may also adversely affect the motor area of the brain and the brain stem, resulting in vision disturbances like double vision. Less commonly, the actual nerves that communicate between the tissues of the eye and the brain can become impaired from a lack of oxygen supply due to subclavian steal syndrome. If the eyes fall out of coordination with each other because of problems with nerves or muscle movement in the brain, double vision may occur.

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