My buddy was welding my exhaust the other day and I got a flash. I drove into the city later that day , every light had a halo around it . Went to my friends shop to have a few beers While drinking under the floresant lights my eyes started to pain , it as like someone threw a handfull of sand into my eyes. Woke up the next moring could not look at anything bright , no tv , no computer , no working on the dart , spent 2 days in the basement where it was dark , went to doctor to get some drops. So much for taking a week vacation and getting a lot of work done. First time in over 35 years being around welding I got a flash. I guess your never too old to learn.