Visual disturbance

[o.p.]

My girlfriend has had a visual disturbance in her left eye for several years now. Her field of view is significantly reduced by a large wobbly scotoma. She underwent several tests and no abnormalities were found. Eventually, she learned to live with the reduced eyesight (which was not so good to begin with).

She recently found out that chiropractic manipulation of the neck leads to a significant improvement in her field of view and also to a reduction in neck pains and headaches that lasts for as long as several weeks. What can this new information reveal about the possible source of the problem? I am asking the question here because she is reluctant to see a conventional doctor after her previous experience of going through many tests with no results and suffering a severe adverse reaction to one of the tests (I think it was a spinal tap).

o.p.

[Dr_prakesh]

My girlfriend has had a visual disturbance in her left eye for several years now. Her field of view is significantly reduced by a large wobbly scotoma.

What do you mean by this?

[o.p.]

By the way she describes the visual disturbance it sounds similar to the form a migraine aura sometimes takes. It's a large area of her visual field where the inside is blurred and somewhat wobbly and the edges shimmer. However, it is persistent and does not follow the way a typical migraine attack evolves.

As I said, a battery of medical tests could not find the source of the problem or any abnormality. She later found that chiropractic manipulation of the neck leads to a significant improvement that lasts for several weeks or more.

I was wondering whether this might be related to the blood supply to the back side of the brain through the vertebral artery. What else is there in the neck and base of the skull that might respond to such manipulation?

o.p.