I always figured Green Gob's yellow eyes were fake. So he's going to need goggles to protect his fake eyes from dust?
Addendum: And majestic1 beat me to it. Dang it!
Addendum 2: Maybe Osborn really wants people to believe he's a goblin creature. So the goggles are just for show to sell the gimmick. There. Rationalized it.
Joking aside, I'm looking forward to the full reveal and how it goes with Spidey.