Hi Mary, I'm curious if there are times when his working memory functions at a high level? Like if he is focused on his own project or such? It could be he always has an internal "master plan" going on that distracts him from things that are outside it (sometimes mislabeled daydreamer.) I'd think figuring out if this memory, attention, motivation, or another factor might be key. It might also be possible that while his brain his catching up with eye therapy that it is demanding a lot of processing. Maybe try some verbal memory games with his eyes closed?