Can you play football if you can’t see? Apparently, people do: http://www.bbc.co.uk/news/magazine-10914782 (Thanks to my wife for this pointer).
This is very inspiring for all of us but as a roboticist, interested in robotic football, I find this especially fascinating – the types of strategies they adopt, the special challenges of adapting action to keep perception within bounds, etc. etc. I should go watch these guys sometime!