The safety glass are quite useful in no. Of application where things can fly and hit the eyes. It's a must have safety gear for the most precious eyes. Karam safety glass will feel weired for a day or two but it will feel natural gradually. I sometimes use it in kitchen also when putting pach foran in hot mustard oil. The splatter of oil can hit the eyes too. When mason was working at my home I gave him this glass while grinding, plastering, cutting jobs and he was so happy with the new safety in which he was working(pics enclosed). So always have a pair of safety at home too. For industry it is must.