I don't know if it's recommended to use glasses under your welding helmet
you have to be carefull with contacts, that you dont melt them onto the old eyeballs!!
Urban Myth!
mine was set to 7 (lowest) the other day somehow, someone must have been messing with it, near blinded myself!
Yeah, that just hurts! my speedglas has an on-switch....f'ing surprise when you forget to put it on...