Hello, Mr Spoke, so sorry about your visual acuity, exercise would help with diabetes?
Unfortunately I suffer from dry AMD, nothing can be done so far, don't smoke, not overweight I exercise vigorously but I found out that I have one of the two gene! Can"t drive, read or ride bicycle on my own, etc, Blind? no, but very motivated to keep observing the sky as I can see using "averted visional."
Keep strong, make sure not to get depressed, make sure people close to you know of your health situation to keep a close eye on your moods. (no pun intended.) Loosing one's eye sight or partial is not for sissy . Depression is very silent hard to detect and share.
Unfortunately, speaking from experience.