> In any case, it's never a good idea to question someone with a different set of abilities than you have with a "is it really that hard?" Their experience far outweighs your naive intuition about what's easy and hard for them.

Wise words, certainly. I apologize if my tone came across as condescending. I asked out of genuine curiosity, as I figured that someone who did not rely on their eyes could have a different, but not worse, perhaps even better understanding of space and spatial relations than someone who does (accounting for individuals being unique, and all that).

But perhaps I'm being blinded by my own eyes. After reading the article wlesieutre linked to, I believe it might be the case.