I have had increasing problems seeing the weld puddle, and had kind of gotten bummed about welding in general.
I'd tried cheater lenses, wearing glasses under the helmet, variable darkness lenses, etc., and none really made a difference.
I recently had cataract surgery and had to weld something recently and was stunned that I had suddenly become a better weldor overnight!
Yeah, for me it was the cataracts that were killing me, and now that the worst one has been removed and a better lens implanted, it has made all the difference. I can now get a pretty good sense of the puddle and the torch, and welding has become enjoyable agai.