Ira
I would make a case for equestrian. Proper form and balance give the most advantage, and I don't really feel like site matters much. Granted, I am a high partial, but I do not rely on my vision when I ride or run a course. Swimming is also quite doable. Once you get used to it. You may bump into the wall of the pool, especially during your first few times doing backstroke, but eventually you come to estimate where walls are. The lane lines, small plastic discs on a rope stretched across a pool to divide the swimmers, will serve as a natural guide. Trust me, if you ever scrape your back or chest across a lane line, particularly whilst doing sprints, you'll make damn sure never to do it again. 
Calum
@dave I’d never considered rowing before and yet it seems obvious now that you mention it. 
Pikachu
If you like diving, I recommend indoor skydiving!! I’m sure you will love it 
Dave Taylor
Calum
Pikachu