Anecdotal, but a friend of mine has essentially no inner eye and has roughly one memorable dream per year, if even. He cannot picture anything internally bar t

Anecdotal, but a friend of mine has essentially no inner eye and has roughly one memorable dream per year, if even. He cannot picture anything internally bar the most basic geometry, and that requires active focus. I know him to have a strong memory across the board, and no particular issues with reading (dyslexia, however he is a very strong reader. Certainly a lot stronger than average). So I wouldn't say there's necessarily anything that prohibits a person with a weak minds eye from having good memory. Not arguing against the point he may be an outlier or that these two features don't often go hand in hand, just pointing out it's not so hard and fast.