The idea has appeared elsewhere; in one of his novels, Ken MacLeod has characters explicitly mention (and worry about encountering) the "Langford Visual Hack". Similar references, also mentioning Langford by name, feature in works by Greg Egan and Charles Stross. The eponymous "Snow Crash" of Neal Stephenson's novel is a combination mental/computer virus capable of infecting the minds of hackers via their visual cortex. The idea also appears in "Blindsight" by Peter Watts where a particular combination of right angles is a harmful image to vampires. The roleplaying game "Eclipse Phase" has so-called "Basilisk hacks", sensory or linguistic attacks on cognitive processes. The concept of a "cognitohazard", largely identical to Langford's basilisks, is sometimes used in the fictional universe of the SCP Foundation.