[Kromm]

It isn't nuts to say that some versions of Night Vision represent not eyes capable of "image intensification" that amplifies visible light, but rather eyes that augment visible light with near-infrared light, as many real-world night-vision devices do. The degree to which amplifying visible light and augmenting it with near-infrared play a role in a specific instance of Night Vision is too fussy to matter in the DFRPG . . . it's all just "you have smaller penalties for partial darkness." And no, if your Night Vision augments with near-infrared, that doesn't mean it will do anything useful in total darkness; lots of real-world night-vision devices that do this still need moonlight or at least starlight to be effective.

Infravision is just the extreme where "amplifying visible light" contributes nothing and "seeing in the infrared" contributes everything. It extends beyond the near-infrared. It is not Detect (Heat) or anything of the kind. It is game-speak for thermal imaging.

So really, our goblin friend here just has a bluer frequency response: more visible, less infrared. Given that this kind of thing is actually a continuum, it isn't especially bizarre.