I did this grinding the wheel arch of a car, ignored it for a few days until it started feeling worse and I was able to see it in my eye. Went to he hospital where they informed me it was imbedded in my eyeball and was forming a rusty halo and needed to be removed pronto, queue one of the most unpleasant experiences of my life. I’m terrible about anything going in or near my eyes I can’t do eye drops and have no idea how people can do contacts. So I had to rest my face in some weird sex dungeon contraption while the 4’6″ nurse called me a big baby for two and a half hours while trying to flick the shard of metal out of my eye with the tip of a syringe, it must have been several hundred times I saw that needle heading for my eye and flinched before I managed to hold still, urrgghh….