Darkvision

Infravision was a type of vision that many non-human species had, in addition to "normal sight", in Dungeons & Dragons and Advanced Dungeons & Dragons prior to version 3.0 of the game. In 3.0 and later, the ability was removed from the game and replaced with darkvision. The primary reason for the change was that, given its name, infravision implied that the creature detected the infrared spectrum of light resulting in a variety of special considerations.

Like darkvision, infravision allowed a creature to see in complete darkness up to a set distance, though not in or through darkness that was magical in origin.

Creatures able to use infravision are often able to shift between the normal spectrum of light and that of infravision at will. While making use of the infrared spectrum, their eyes glow red.

Creatures known to have infravision include:
 * Halflings
 * Dwarves
 * Drow
 * Duergar
 * Svirfneblin
 * Elves

Spell
Infravision was also the name of a wizard spell that bestowed this ability on the target.