Back when I worked at a machine shop, one day the foreman walked up to a guy running the next lathe over from me, and said, "I'm ordering some supplies this afternoon - what color glass eye do you want?"
"Huh? What do you mean?" the guy said. And the foreman replied, "What are you, brain dead? If I see you without your safety glasses on again, you're out of a job. I'd rather have you unemployed than missing an eye."
We're required to wear safety glasses everywhere in the plant at work, except office areas and the lunch room. Maybe a little excessive, but I've always worn safety glasses anyway.
Well, last week I was pulling nails from a skid left over from a big piece of machinery just delivered from Austria (I'm bringing that wood home!) and a nail I was pulling out of 6 x 8 flipped up from the crowbar and went smack into the lens of my safety glasses. There was a divot from the nail point dead center of my right pupil. So I went to my office and got a new pair.
I wear safety glasses, ear plugs, and these days a hard hat too when running a saw. I don't like ear muffs because they're hot. Maybe fine in the winter, but not when I'm sweating. Ear plugs are a lot more comfortable for me, and I'm used to them.