Wow. I hope you heal quickly and completely. I have been hot swarfed on the lens, did not enjoy that, to say the least. Many great points brought out here, but I wish to focus on Iron Dragons' "are you going to hit it or look at it" remark, heard Thomas drop that line, as well. The closer you have your eyes to your hot work, the more difficulty you are likely to encounter, as bounded by the pesky inverse square law. If your face feels hot, be assured that your eyes will be feeling hotter, though one may not notice. In short, best to observe glowing metal from a distance, and learn the tricks and tells as earlier laid down. hammer head rubbing, that is a good one.
I think it goes back to look at it or hit it, though, as in training your machinery to strike true. Hit it with my arm, not my eye? Hopefully I will use my amber IR glasses more often...
Robert Taylor