mmm - strange. I think if you're prepared to face a live blade, you should be prepared for some damage from hands and elbows.
I would feel that goggles give me an unreal perspective (due to distortion), and would it also make you worry about your eyes when someone attacked you in reality?
I think safety in training comes down to methods more than protective gear. For me, injuries are avoided by starting off slowly when doing technique, and doing it faster as you get used to it. Uke also has an obligation to look after themselves (or what else are ukemis for?), and really should be reacting to these 'atemis'.
The only thing I really worry about permanent eye injuries with is bokken work - especially when you swing back your bokken and someone is behind you. (same applies for jo I suppose). But this requires better spacing, not goggles.