1
"If my eyes went bad even a little bit I wouldn't be able to hit home runs." :- ) ... sorry about your disease Matt. Definitely rules out 'net chess on the 2D monitor.
I would say that playing blindfold takes about 600 points off your rating. A few times I've been in tournaments were absolutely-blind people had a tactile board in their laps and they played fairly well.
But the point is, any decent tournament player (such as you) is in a position to discuss a chess position with anybody.