Darkvision

Infravision was a type of vision that many humanoid species had, in addition to "normal sight". It allowed a creature to see in complete darkness up to a set distance, typically 60' (18.3 m), though not in or through darkness that was magical in origin. Subterranean humanoids often possessed superior infravision that allowed them to see in the dark at a distance of 120' (36.6 m).

Despite the name, this form of vision did not allow creatures to see light that fell within the infrared spectrum.

Creatures known to have infravision included drow, duergar, dwarves, elves, halflings, and svirfneblin, among others.