BTW, don't laugh too hard at the idea of a blind photographer. There are at least three legally blind photographers living and working in the San Francisco area that I know of ... their work is remarkable in that at least two of them do their own printing as well as making photos, and one uses a manual focus camera. He, I believe, is the least blind of the group, with a 20/200 vision.
I had a blind photographer as a customer when I worked for CVS. He used a P&S camera. No great works of art but he shot as well as half of my customers.
WRT the blind photographer shooting the manual focus camera, I don't believe 20/200 is even close to blind. I have 20/100 and my prescription is not that severe. I'm sure the list must have an optometrist or eye doctor that can confirm or correct me.
Butch