Aus Ron Harris Muscle Mail:

He wasn't born blind, but instead began losing his sight as a child and it has been rapidly deteriorating ever since. Last time I talked to him he said he could see shadows, that is to say, if someone walked in front of him and blocked out the light, he would know they were there. But he certainly can't see enough to be able to move around and do things like the rest of us who take our eyesight for granted. He has to be led around the stage when he competes, and has to count the plates on dumbbells and machine stacks with his finger.
Greg is the perfect person to point to and ask yourself, "what was your excuse again?" So many guys love to tell me that they want to look like a bodybuilder, but can't. They don't have the money, they don't have the time, they don't want to take drugs, they have a bad lower back, shoulder, knees, whatever. I have heard all the excuses there are. Then you look at what Greg has accomplished without even being able to see. The guy had to learn how to pose by feeling his muscles contract. He can't look in the mirror and see the incredible body he has built.