The person with the vision condition is a friend of Conjunction Junction - thank you for the informtaion. CJ - check out these two comments:
https://freerepublic.com/focus/bloggers/3735908/posts?page=1482#1482
https://freerepublic.com/focus/bloggers/3735908/posts?page=1483#1483
Walking is certainly a good complement to the amazing effects of niacin (the flush variety of vitamin B3).