What would you do for a klondike bar?

Would you get goggles permanently affixed to your eyes?  Well, if your Klondike bar is an olympic gold medal, then you just might.  All it takes is a little superglue and you have aerodynamic (or is that hydrodynamic) visual assists that can shave off a few hundreths of a second.  Well at least according to Nike is will:

Of course, this still doesn't explain the weird mirrored goggles that I'm seeing them wear tonight.  Anyone knwo the story behind those?  How do they see through them and (more importantly) what's the benefit to them?