I feel sorry for the workers using the acetylene torch and doing the gas welding with no eye protection. Your eyes have to last a life time. I spent a year in Afghanistan in the Army. We had Afghanistan contractors come and work on post facilities and they never had welding helmets only sun glasses. I was so proud of my men. They all brought their personal auto dark helmets from home with them. They all gave away their personal helmets to the local Afghanistan welders and used the cheep, heavy, awkward helmets provided by the Army. Everyone felt so sorry for those men wrecking their eyes, they could not afford a helmet.