Blind Men Can See

I saw something strange today. I saw a blind man wearing dark sunglasses and walking with a cane. Nothing unusual there. It was quite a busy street and everyone was getting out of his way. The strange thing was when I saw him look at his watch to see the time. Obviously he might have only had impaired vision rather than being completely blind but surely even then it would be difficult to read the time. Plus if he can see well enough to see the time on a small watch face surely he wouldn't need a cane to find his way around. I don't know, seemed odd to me.