When I took welding shop class in high school, our shop teacher literally called it “sand eye” when he explained why wearing a welding mask was not optional in his shop or in general while welding. Sure enough, there was that one kid who thought he could get by with his squints while teach wasn’t looking… He was out for days with sand eye and had quite the cautionary tale to share when he returned. Everyone got downright religious about the welding masks after that.