The blinds are actually good at this echolocation stuff. Was opportune to know someone that was blind while coming. He knows everywhere in his house and also knows how to get to anywhere in his house. I was shock when I saw those stuffs then. They also concentrate a lot also. During my course of training as a nurse, we went for educational visit in the school for the disabled, on getting there, we heard that the school head master was blind and then I became curious to see him. Low and behold he came to work that morning, I saw him as he was about to enter his office. He was holding bunch of keys, I realized he was touching them one after the other without making any mistake. He found the
right key and tried it just once and the office was opened. I was just amazed when he started addressing us without thinking of what to say or words to use. He speaks English fluently also. I started questioning myself on how is all this possible. Thank for the post as you just answered my questions then in your write up.