called end blindness by 2020, and, you know, sue and my family and my college roommates, art and jerry spire, he was actually a witness to my subway odyssey, who have been with me and for me since we both entered columbia college together, we launched an effort a few years ago to end blindness by 2020. >> you know, sandy what i find very interesting about you -- first of all, i must say having art and jerry spire as roommates is a very good beginning to life from any point of view. (laughter) but how did you accomplish what you accomplished with this handicap? i mean, you went to harvard, you made a major invention, you've led a rich life, you're happy married. >> well, i told you, the centerpiece is sue, and then my family, my children, paul, jimmy and katherine have stuck by me and these two guys who as you say, i was really fortunate enough to meet when we all started columbia together. but, you know it's not all black or dark. i don't want to leave that impression with you because when you're not distracted by visual images, you develop a life within your mind. so i can see you now, eric