Hi Martin
I too have the same thing you describe. Both the "warped" vision problem and the problem with dimly lit and dark settings. Just to be clear, the vestibular system includes your eyes, your inner ear, and your muscles (proprioception), and all of the connections in the brain in between those 3 things. It is very complex and difficult to pinpoint exactly where the problems lie.

I believe that the "warped" vision as you describe it is a vestibular problem not detectable by the vision tests, at least in my case. I was checked out by a neuro-ophthalmologist who said there is nothing structurally wrong with my eyes and that I would not benefit from prism glasses. I have not been to see a developmental optometrist, which is a different kind of eye doctor. I have been seeing a vestibular therapist who specializes in vestibular issues. My "warped" vision and dizziness was extremely debilitating months after my injury. It has improved with vestibular therapy, though has not totally gone away.

Have you had vestibular therapy?