Blind people visit

we had an assembly at school today about blind people. this blind lady had a really cute golden retriever named Bingo!!!! Bingo could respond to voice command like "find door" and "find another door" and "find stairs" and different directions and if she was about to run into a wall or something then Bingo would maneuver her around the stuff!!! The lady had been blind all her life, but could see some stuff. The guy who was there hadn't been blind his whole life. When he was twenty-five, the doctor dudes said that he was going to be fully blind by the time in three years if he didn't do this laser-treatment thingy. So he did the laser-treatment thingy, but in SEVENTEEN MONTHS he became fully blind. He told us to close our eyes because he was going to show us how you hear a lot when you're blind. We did. After a few minutes he screamed BOO really loud. We opened our eyes, and he said that that's why it's so different to be blind, because they can't just open their eyes. it was an AMAZING assembly!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!