Mrak0020 I didnt know about Jens website, thanks for that link here. I wrote her, she doesnt seem to know about the issues connection to BVD.
Regarding that case of the one eyed person - that is really unique. There could still be some accomodation problems, which only affect one eye. Those usually result in a burning feeling and bloodshot eyes. I had to train accomodation in each of my eyes separately for months before training binocular vision.