@LukeAlmighty I think the lore behind that part is that it's technically not a laser per se. It's supposedly not photons. It's main energy output is not heat energy, but kinetic energy. And I assume he manages to melt things because when the kinetic energy hits, and has nowhere to go, it starts converting into heat energy in the object it hits (kinda like how you can supposedly cook meat by repeatedly slapping it).
>but then why don't the glasses heat up, because the beam does hit them
Not sure tbh. But I generally got the impression that the glasses reflect the beam back at the source, his eyes. Which... well, if they can generate something that weird, they can probably take it back in too. I also heard that the eyes technically don't generate the beams, but rather they act as a portal to some weird ass dimension where this energy just exists everywhere. So the energy just escapes through his eyes.
But again, most of the things I know about X-Men come from the animated shows, especially the original 90s run. So my knowledge is as accurate as those shows were.
But is it quite fascinating to see the lengths various writers went to to explain some of these physically impossible powers.