Infravision is the ability to see in the dark and is common to almost all subterranean creatures. Infravision cannot be used within the ambit of any light source. Unless otherwise stated, infravision has a range of 60-ft, although some exceptional subterranean creatures have a longer visual range. Infravision does not detect colours and is of little help while searching or making minute examinations, so sapient creatures such as orcs may well prefer torchlight even if they possess infravision.