I've had a couple close calls and really try to wear glasses no matter what now. It's usually the random stuff that gets you. I scratched my cornea (minor) stacking wood. i was just moving stuff around nd dropped a piece of wood, something kicked up into my eye and a piece was sharp. Lots of pain, I didn't go to the DR. The weird part was a few days later I rubbed my eye and this giant black thing came out, it was a chunk of wood that had somehow gotten stuck in there.. felt a LOT better when that came out.
Now I always wear glasses, though as mentioned that's not a sure bet. I often wear glasses + a face visor now, the visor doesn't fog up as bad as goggles.