Rust in the eye..The answer is yes. Seriously guys, it happened to all of us, make sure the particles are out of the eye.
It happened at night, normal little rust fell under my glasses while I was under the car, no big thing right? I cleaned my eye, it was getting late so I went to bed. Next day it was like I had a grain of sand in it, no big deal, it will come out, right? Well No. I went to the doctor to see if it was still there, and yes! It was digging its way towards the center every time I was opening/closing my eye.
He took mini-pliers to pull the little piece out, after used a mini-grinder to grind my eye, yes you hear right. Trust me, my eye lid wasn't opening easily with a grinder in sight. I have put medication and everything is good now.
Moral of the story, watch out, work intelligently, don't try to go to fast!