my great grandfather gone blind years beofre i was born. when i was 5, he pointed out the birds by kind in flight and distance, and built all kind of house furniture, home repair. strangely to me, he was able to somehow 'see' the tape measure, maybe just he had a keen sense of measures. a few years later, his sight started coming back he said, then he passed. this is not such a great story, just an example the human brain and personal encouragement can go a long way. hats off to mr kish.