So I'm in trade school for welding and we just recently started stick welding, before we were oxy acetylene welding, and im a little worried about arc eye. I saw the arc on accident without my mask on like 4 or 5 time for a split second. Left black spots in my eyes and I've had a headache all day I'm assuming from that. Just wondering how much it would take before it causes burn in my eyes? I was within 3-5 feet each of those times. Thanks and sorry if this is a stupid question, I'm a newbie.