When I was starting out I would practice 5-6 hrs a day stick welding with an old style helmet and a #10 shade. Often I couldn't get the old helmet down fast enough and by the end of the day I would have a mild case of eye flash burn. I found that when I detected the initial discomfort in my eyes (slight soreness, etc.) I used a sterile eye lubricating solution from CVS aright away. That seemed to relieve the pain and let me sleep through the night until the next day or so when the eyes had healed. Now I always carry a bottle with me in my gear bag. It wasn't long before I went to an AD helmet. Recently, I started wearing UV safety glasses under my helmet.