Digital BW, The Print

sorry to hear about your sight - from what you say you have 
difficulty in seeing what is in the viewfinder, but can work via a 
large screen.
If that is so, you might want to explore another possibility - yes it 
not be cheap, but it might be OK.
Some of the mid range digital cameras use an electronic viewfinder in 
place of the conventional optical one.  On these it is possible to 
connect a TV and get the viewfinder up on that.
So you could have a large screen to look at.  

Another possibility is that Olympus do a thing like a pair of eye 
glasses (called Eye-Trek)that are a TV monitor - meant for viewing TV 
from a portable MPEG player.  This might work for you.

I would guess that inkjet printing would also be the way to go for 
you - no focussing!

Good luck
Keith