My previous Didymium glasses grew legs a while back, but they specifically block the Sodium yellow and thus would hide the flame when the smoke burst into flame, though the drop in smoke would still show. they would also show the copper green quite brightly where it would be hidden in the sodium flame. The very bright high heat would cross the entire spectrum and so still be very bright, by it does block a broad area of the infrared as well, in a different part than the iron green glasses that also block a good part of the visible spectrum as well (hence they look much darker than Didymium)
I did meet another Glassblower, who was a professor in physics for her main job, that had researched it and said that between the didymium and the iron the entire infra-red was blocked and so wore both {clip-on iron over didymium) when working furnace glass. I have looked for someone making glasses using both as colorant but not seen them. Perhaps wearing those under the glasses that came with the GF would be like wearing a belt and suspenders but safest of all and bring that bright dot down if you insist on staring at it.
When watching I try to position myself so I am not looking at it or use my hand to block it,