Dear friend, welcome and thanks for entrusting your query here at HCM !
Your symptom complex can be due to various causes.
Brain affection by different causes can produce tunnel vision
, confusion, dizziness
...hind brain circulation problem being one of them.
Is it continuous or intermittent?
Is it in both eyes?
Is there any nausea
, headache, imbalance?
i would advise medical check up with a good physician to rule out anything serious, as some causes are dangerous.
I hope you are fully satisfied with the guidance I gave.
I would be glad to answer any further queries.
Thank you and Good luck !