My father went blind when he worked for the Ford company, welding. He wore the goggles, but apparently welded a little too long - like 10 hours a day. Not sure you can call it an accident - but it happened.
He never once saw my face, by the way. He was 100-percent blind before I was born.
When I worked in the emergency room, we'd often get men in who did some welding or watched someone else weld - and they'd literally come in screaming in pain - very painful. We'd always wash out their eyes, put in all sorts of special medications and then wrap them - they had to keep the shield on for three days and we never knew for sure how much damage there was until they got re-evaluated by a specialist we would send them to.
Because we were an emergency room, they usually didn't return to us. But I do know of two cases where the men lost part and in one, most of their eyesight.
Sad. Dumb accident.
But I guess an Explosion might do it - chemicals in the eyes - car accident that brings metal from car into their face.