[[quoteright:350:[[Manga/{{Bleach}} http://static.tvtropes.org/pmwiki/pub/images/109326-hollow_ichigo_super_2909.png]]]]
[[caption-width-right:350:Who's crazy now?]]

Some characters just need a way to show off how [[DarkIsEvil undeniably evil they are]]. Unfortunately, [[BlackEyesOfEvil pure black eyes]] just seem too monochrome and don't allow said character to show off an extra spark of insanity. Cue the Black Eyes Of Crazy. In these cases, the [[http://en.wikipedia.org/wiki/Sclera sclerae]] (the whites of the eyes) are black, as are the pupils, but the irises themselves retain their colour, [[TechnicolorEyes which can vary]]. Generally an indication that the character is not above going on a rabid, murderous rampage, and, as such, usually coincides with AxCrazy, though this rule is not [[DarkIsNotEvil absolute]]. It also heavily overlaps with BlackEyesOfEvil, due to AxCrazy being a subtrope of ObviouslyEvil.

Subtrope of UhOhEyes.


[[folder:Anime & Manga]]
* In ''Anime/YuGiOh5Ds'', anyone who becomes a Dark Signer has their sclerae darken to black and goes rather insane.
* ''Manga/{{Bleach}}'': Hollowfication causes a deceased human's higher reasoning to be stripped away as they are reduced to beings that act on pure instinct, driven by insatiable appetites to commit violent, murderous deeds. One of the defining characteristics of the hollow are their black sclera. Other beings that undergo hollowfication, such as shinigami, have to fight to control and master their inner hollow. Whenever these "Vizards" hollowfy, their eyes bleed black to indicate the transformation to their SuperpoweredEvilSide has begun. Even after receiving Vizard training, whenever his eyes bleed black, Ichigo becomes dangerous and violent even by the standards of other hollows.
* ''Manga/MyHeroAcademia'':
** Averted with the BigGood All Might, who is the TheCape through and through. His sclera probably aren't actually black, but his eyes are perpetually [[HiddenEyes shadowed]] aside from his blue irises.
** Mina Ashido is another aversion; despite actually having black sclera (as well as a generally alien-like body), she's not only a Hero, but a GenkiGirl.
* In ''[[VideoGame/DotHackGU .hack//GU]]'', characters who are possessed by AIDA will often gain these eyes, particularly during AxCrazy moments.
* ''Manga/SgtFrog'': the assassin Zoruru has this combined with [[RedEyesTakeWarning red pupils]], along with [[{{Cyborg}} a half-cybernetic body]] covered in SpikesOfVillainy and a BladeBelowTheShoulder. Despite this, nobody can ever remember who he is...
* ''Manga/MahouSenseiNegima'' uses this quite a lot, along with BlackEyesOfEvil. In fact, Akamatsu notes that Shinmeiryu users can tap into something that's basically the dark side for extra power. While this is [[DarkIsNotEvil not actually evil in itself]], it does appear to cause a great deal of bloodlust along with turning the eyes completely black.
** ''Manga/LoveHina'' foreshadowed this late into its run. Keitaro's family own a cursed samurai sword that causes the wielder to take on black eyes and start killing or molesting anyone in sight. It took two of the world's greatest swordswomen to reseal it and even then it could still be unleashed if they're not careful.
* In ''Manga/{{Naruto}}'', using the second stage of Orochimaru's cursed seal turns the sclerae of your eyes black and the irises gold. Sasuke gets bonus points by using the Sharingan with the black sclera for bonus creepiness.
** And Jugo by proxy.
** Shukaku and Gaara, when transforming into his partial form, have black sclera and golden cross-shaped irises.
** In the manga, Hanzo and the 3rd Raikage both inexplicably have black sclera (but they still have irises and pupils), though, in the anime, Hanzo's eyes are normal.
** During Naruto's training with Killer Bee to control the Nine-Tails, he is made to fight his EnemyWithout, a manifestation of his lingering resentment toward the Leaf Village for the ostracization he suffered as a [[SealedInAPersonShapedCan jinchuuriki]]. It takes the form of Naruto, with black sclera and red (in place of Naruto's blue) irises, which return to their normal color when Naruto learns that the only way to win the fight is to accept his own feelings and move on. During his later BattleInTheCenterOfTheMind with the Nine-Tails, one of Naruto's eyes starts to change to black and red when the Nine-Tails nearly takes over him through ThePowerOfHate, but [[spoiler:meeting his late mother's spirit]] reverses this.
** A specific variant of this color scheme, which also functions as MindControlEyes, is seen in those [[spoiler:brought back to life by [[{{Necromancer}} Kabuto]]'s version of Impure World Resurrection (which, oddly, includes the aforementioned two, who look exactly the same).]]
*** [[spoiler: Kabuto himself has these when he uses his version of Sage Mode.]]
* In ''LightNovel/ScrappedPrincess'' episode 3 or 4, when everybody besides Pacifica gets put under mind control, this is expressed by turning all of their sclerae black (and their irises red). Whenever anybody is snapped out of it, their eyes return to normal.
* Masane from ''Anime/{{Witchblade}}'' gets these when transformed. The Cloneblade users[[note]]Reina, Shiori, and Nora[[/note]] and Dual Cloneblade users[[note]]Maria, Aoi, and Asagi[[/note]] gets these when they transform as well.
* Because of a curse, [[spoiler: Darcia]] of ''Anime/WolfsRain'' [[spoiler: has [[MarkOfTheSupernatural one normal eye and one wolf eye]]. He hides it under a mask or eye patch. People who see it fall unconscious. By the series end, it is clear that he is more than a little AxCrazy.]]
* ''Manga/RurouniKenshin'' brings us Jinei Udo. His eyes are black with golden irises and pinpoint pupils which are capable of paralyzing you if he so chooses.
* Subverted with Renamon from ''Anime/DigimonTamers'': she has IcyBlueEyes with black sclerae, but is a LadyOfWar with NervesOfSteel and a member of the core TrueCompanions.
* ''Anime/DragonBallZ'': Majin Buu in his familiar fat form has normal-looking eyes [[EyesAlwaysShut when we actually see them]], but his evil incarnations have eyes with black sclerae. Evil Buu (the gray form) has white irises (which, [[OpenTheIris when wide enough]], can be mistaken for normal eyes due to having distinct pupils), while the Super Buu and Kid Buu forms have [[RedEyesTakeWarning red irises]].
* [[TheSociopath Haguro]] from ''Manga/WolfGuyWolfenCrest'' is perhaps THE scariest looking ninth grader because of his eyes.
* Christopher Shouldered from ''LightNovel/{{Baccano}}'' has [[RedEyesTakeWarning red sclerae]] rather than black (as the result of an extreme and perpetual case of red eye), but nonetheless matches all the connotations of the trope.
* ''Manga/CodeBreaker'': The five "Angels" (plus [[spoiler: Sakura when she was a child]]), a five-bad-band of {{Power Nullifier}}s whose eyes go jet-black when they suck the life out of power-users, in this case [[ForTheEvulz just for fun]]. [[spoiler: Fortunately the power-users' masters anticipated that and made one of them Magneto: an iron beam in of itself isn't a power.]]
* The ghouls of ''Manga/TokyoGhoul'' have eyes with black sclera and red pupils.
* {{Averted|Trope}} in ''Manga/OnePunchMan'' with Genos, who has black sclerae due to being a cyborg but is otherwise one of the most virtuous, self-sacrificing and law-abiding characters in the series.
* In ''Manga/ThouShaltNotDie'', the local [[TheHeart sweet girl]] Mashiro can get these types of eyes mixed with [[HellishPupils slit pupils]] for extra effect whenever she receives sufficient physical trauma. This serves as a clear sign to anyone nearby get the hell out, since she is about to go postal on anything and anyone in the vicinity, FriendOrFoe.

[[folder:Card Games]]
* The vampire [[TabletopGame/MagicTheGathering planeswalker]] Sorin Markov apparently has [[http://www.wizards.com/mtg/images/daily/ftl/ftl78_sorin.jpg black sclerae and golden irises]]; in the actual card, this is hard to notice, since the image, obviously made smaller, doesn't focus much on the eyes.
** Actually, he's not exactly crazy as the rest of the entries in this page are, but the vampire clans he descended from used to be normal humans, and the blackening of the sclera happens when they turn into vampires.

[[folder:Comic Books]]
* Subverted in ''ComicBook/{{Legion of Super-heroes}}'', where two members of the Legion, Superman X and Timber Wolf, have eyes like this.
* ComicBook/{{Gambit}} of the Comicbook/XMen has these, and his irises exemplify RedEyesTakeWarning, but he is neither evil nor crazy. Usually.
** It should be noted that, despite the fact that he's usually a good guy, he did have a reputation in his hometown as "Le diable blanc"-- people saw him as a demon because of his red-on-black eyes.
* Another counterexample is Jericho of the ''ComicBook/TeenTitans''. When he's about to possess someone, he makes eye contact with the victim and the whites of his eyes go black. (Mind you, he was crazy for a ''little'' while, but hey, that happens to everyone in comics [[strike:sometimes]] at least once.)
** Similarly, In ''ComicBook/TeenTitansGo'', the Tie-in comic with [[WesternAnimation/TeenTitans the TV Show]], the evil version of Aqualad was shown to have black eyes with red irises. Regular Aqualad just had solid black eyes.
* Doctor Robotnik/Eggman and Doctor Finitevus from ''ComicBook/SonicTheHedgehog''. Interestingly enough, Robotnik's crazy red-on-black-eyes were first revealed in [[MilestoneCelebration issue #200]], [[VillainousBreakdown when he was]] [[FreakOut defeated by Sonic]] [[VillainousBSOD one too many times]]. The Bride of the Conquering Storm also has black sclerae [[ElectronicEyes with visible circuits]] after being [[{{Cyborg}} legionized]], but she's not really crazy, just [[AmbitionIsEvil power-hungry]].
* The ComicBook/RedSkull, DependingOnTheArtist. Carried on to the ''WesternAnimation/XMen'' animated series and the ''WesternAnimation/TheAvengersEarthsMightiestHeroes'' animated series.

[[folder:Fan Works]]
* ''FanFic/TheBridge'' uses this as a way to distinguish between [[NobleDemon Monster X]] and his SuperpoweredEvilSide, Kaizer Ghidorah. When turned into a human in the Equestria Girls realm, X has normal white eyes (albeit with a red iris), Kaizer Ghidorah has black sclerae. [[spoiler: Similarly when Aria Blaze copies some of their powers and channels Kaizer Ghidorah's energy, her features shift to resemble Kaizer's. One of which is this trope.]]

[[folder:Films -- Animation]]
* Shan Yu from ''Disney/{{Mulan}}''.
* In ''WesternAnimation/MyLittlePonyEquestriaGirls'', OneWingedAngel Sunset Shimmer has these with green irises.
* Bruce the Shark from ''WesternAnimation/FindingNemo'', after he gets a whiff of Dory's blood.

[[folder:Films -- Live-Action]]
* Santi from Guillermo del Toro's ''Film/TheDevilsBackbone'' has black sclerae and pale bluish irises.
* In the film version of ''Film/LordOfTheRings'', Frodo gets them after being corrupted by the cursed Nazgûl blade.
* People turned into vampires by the eponymous Count in ''Film/{{Dracula|1979}}'' have black eyes with hellish red pupils.

%% * Valentine Morgenstern from ''Literature/TheMortalInstruments''.
* In the ''Literature/HIVESeries'', this is the mark of someone who has been infected with Animus. They also have black blood.
* ''Discworld/SmallGods'' has Vorbis, who comes from a desert tribe with black sclerae (it's mentioned he looks like he's wearing his sunglasses on the inside). On the Disk, where eyes are very much the window to the soul, he's bad news indeed, though of TheFundamentalist kind of crazy rather than [[InsaneEqualsViolent the loud, multiple-exclamation-points type.]]

[[folder:Professional Wrestling]]
* Wrestling/{{Boogeyman}}'s eyes inexplicably turned black during his feud with Big Daddy V. Of course, Boogeyman is crazy.

[[folder:Video Games]]
* The [[HarpingOnAboutHarpies Harpy]] from ''VideoGame/DragonsDogma'' have these as their default eye colours.
* [[spoiler: King Dynal]] in ''VideoGame/FossilFighters'' has these, and despite being an [[spoiler: alien]], he's the only one, even among the other [[spoiler: aliens]]. He's the BigBad...[[spoiler: until a GiantSpaceFleaFromNowhere pops in and he does an abrupt HeelFaceTurn.]]
* In ''[[VideoGame/DotHackGU .hack//G.U.]]'' this happens to players that get completely overtaken by AIDA.
* In ''VideoGame/TheElderScrollsIVOblivion'', the [[LonersAreFreaks more reclusive]] vampires have these, usually indicating that they do not care about trying to blend in with normal society.
** As well as Sheogorath, the Daedric Prince of Madness. Can't get much crazier than that.
* Overlord Pram from ''VideoGame/MakaiKingdom'' has them, though she's more {{manipulative|Bastard}} than crazy. In the same game, the legitimately AxCrazy [[TheBerserker Berserker]] class has them as well, even carrying over into Disgaea 3.
** In ''VideoGame/Disgaea2CursedMemories'', the Real Overlord, Zenon [[spoiler: Rozalin]], has them, and, like the Berserkers from ''VideoGame/MakaiKingdom'', is legitimately AxCrazy.
** In ''VideoGame/Disgaea3AbsenceOfJustice'', [[spoiler: Super Hero Aurum's OneWingedAngel form]] has them, and he's definitely messed up in the head.
* The game-breaking Gideon class from ''VideoGame/SoulNomadAndTheWorldEaters'' have them, minus Heroman.
* Akuma/Goki from ''VideoGame/StreetFighter'' sometimes has these DependingOnTheArtist, when not being depicted with [[RedEyesTakeWarning fully red eyes]].
* Both subverted and played straight in ''Franchise/{{Pokemon}}'': black scleras are rather common, but they don't necessarily mean anything about the owner's behavior. While some bearers of them are described in the Pokedex as being violent and dangerous (Most notably Hydreigon), it's never shown to be a consistent trait among their species [[InformedAttribute (if it's even shown at all)]].
* The Thwomps from the ''VideoGame/SuperMarioBros'' series originally had these, before shifting over to RedEyesTakeWarning in ''VideoGame/SuperMario64''.
** ''[[VideoGame/MarioAndLuigiPartnersInTime Partners in Time]]'''s [[AliensAreBastards Shroobs]] have black sclerae and red eyes.
* Subverted with most asari in ''Franchise/MassEffect'', whose eyes turn black when they meld their minds with another, an action done to not only share information with others, but for lovemaking and procreating as well. If the asari is an [[DeathBySex Ardat-Yakshi]], though, it's played straight.
* ''VideoGame/DirgeOfCerberus'' has these with [[TheBigGuy Azul the Cerulean]], a huge StoneWall of a villain, whose black-and-yellow eyes show he's not one to be trifled with.
* In ''VideoGame/FinalFantasyXIV'', male Au Ra of the Xaela clan have dark sclera, which coupled with their dark scales, horns, and sharp facial features lends them an unavoidably sinister look. They're not actually evil, though the clan's culture is noted as being violent, consisting of several nomadic tribes that are constantly warring with one another over territory.
* The Kelari race in ''VideoGame/{{Rift}}'' have black sclerae, but they're a case of DarkIsNotEvil.
* The Sabbat in ''VideoGame/VampireTheMasqueradeBloodlines'' combine this with RedEyesTakeWarning by having completely black eyes except for the blood-red irises.
* In ''VideoGame/AzureStrikerGunvolt'', all of the bosses sport such eyes.
* In ''VideoGame/DragonFable'', recent class revamps for Necromancer and Death Knight included new artwork which gives both classes these eyes, with green and red irises, respectively. As well, Icebound Revenant is a new armor [[{{Microtransactions}} that can only be obtained with Dragon Coins]]; it's essentially an ice-themed variant on Death Knight, with blue irises, appropriately enough.
* Undead in ''VideoGame/DarkSouls'' nearly always have sunken, black eye sockets when they go Hollow, and with the exception of the PlayerCharacter, when they look like that, they've gone irrevocably, murderously insane.
* In ''VideoGame/{{Miitopia}}'', Miis that are turned (thankfully temporarily) evil by enemies get black eyes with red sclera.

* In ''Webcomic/{{Drowtales}}'', Asira'malika Val'Jaal'darya has darkened Sclerae (believed to be the result of a failed medical experiment). It's not clear if she's this trope played straight, averted, or subverted, but she does have [[http://www.drowtales.com/mainarchive.php?order=chapters&id=917&overview=1&chibi=1&cover=1&extra=1&page=1&check=1 an evil laugh]].
* ''Webcomic/{{Sidekicks}}'': The villain Phantom, who is a mind controller, has black sclera and purple glowing irises. [[spoiler:When Iblis gets his superpower her eyes take on the same colouration.]]
* In ''Webcomic/TowerOfGod'', Season 2, a character named Rapdevil appears. Though not evil per se, he is strongly associated with demonic powers and his entire color scheme from his clothing to his shortly trimmed hair is black-yellow. So why shouldn't his eyes be that way, too?
** Then there's Season 1 character Rak Wraithraiser, [[PettingZooPeople a humanoid alligator]] with black sclerae and red irises.
* In ''Webcomic/GirlGenius'', the very minor and not-particularly-crazy (but still likely Sparky) character Dr. Vg had red eyes with black sclera. Tinted glasses were used to hide this.
* [[spoiler:Asia Ellis]] in ''Webcomic/{{Morphe}}'' [[http://morphe.thewebcomic.com/comics/2075482/47-w-gh/ gets these]] when [[spoiler:Hizrim, an Abyssal PuppeteerParasite]], pulls a GrandTheftMe.
* Dr. Schtein from ''Webcomic/StringTheory'' gets prosthetic eyes after an accident. They're [[http://stringtheory.nfshost.com/comics/pagethree black]] with [[RedEyesTakeWarning red iris apertures]].
* Played straight and [[SubvertedTrope subverted]] in ''Webcomic/TheZombieHunters''. [[OurZombiesAreDifferent All classes]] of TheUndead have black sclerae with [[GlowingEyelightsOfUndeath Glowing Irises Of Undeath]], though the Basilisk, a class with a [[MagicalEye paralyzing gaze]], has [[RedEyesTakeWarning red irises]]. Charlie, a [[HalfHumanHybrid partially]] [[HumanityEnsues revived]] zombie restored to sentience, is a subversion, sporting [[DualityMotif one human eye]] and one undead eye, which he [[RedRightHand hides]] with a contact lens.
* ''Webcomic/TwoKeys'': Colin, the protagonist, gets these as opposed to his normal, CreepyShadowedUndereyes look. He didn't go crazy, [[TheyreCalledPersonalIssuesForAReason just got really pissed off after]] [[MindScrew a guy he's fighting]] starts to touch on his DarkAndTroubledPast
* ''Webcomic/WaywardSons'': Kronos got these after the [[MassSuperEmpoweringEvent star core incident]], along with his powers.
* ''Webcomic/HeartCore'': Some of the more powerful demons in the series have this permanently and most other demons get this during fits of rage or when they go AxCrazy.

[[folder:Web Original]]
* [[Wiki/SCPFoundation SCP-040]] [[http://scp-wiki.wikidot.com/scp-040 Evolution's Child]] is a subversion, having only one eye with a black sclera and defying the traditional roles of evil and insanity.
* The [[http://loonadventure.tumblr.com/ moon]] blog features an AlternativeCharacterInterpretation of Princess Luna from ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' who has gone insane from her 1000 years of isolation on the moon and now sports these kinds of eyes, along with the occasional black {{Tears of| Blood}}... something.
** The many WebOriginal/{{Zalgo}}-fied Pinkie Pie/Pinkamena [[http://uncyclopedia.wikia.com/wiki/File:11178_-_creepy_pinkamena_diane_pie_pinkie_pie_zalgo.png images]], some of which were used in the ''VideoGame/LunaGame'' {{creepypasta}}.
* ''{{WebAnimation/RWBY}}'' has [[spoiler:Salem, the series' GreaterScopeVillain]], who combines the trope with RedEyesTakeWarning and TaintedVeins to make for an extremely sinister, eldritch appearance.
* ''WebAnimation/{{Dreamscape}}'': Keela gets these in her SuperpoweredEvilSide.
** Kaila's eyes are black with white pupils, and she is a bit unhinged for what Keela did to her master.

[[folder:Western Animation]]
* Black Wolf, the villain of the ChristmasSpecial ''WesternAnimation/TheFlightBeforeChristmas'', has black sclerae and an [[CarnivoreConfusion insatiable appetite for flying reindeer]].
* In ''WesternAnimation/{{Ben 10}}'', Whenever Ghostfreak (real name Zs'Skayr ) takes over the body of someone as a host, that person's eyes become black with purple pupils (and pitch black nerve-like extensions around the eyes), very similar to his eyes in his normal form. You do remember who Zs'Skayr is exactly for Ben, right? ( TheDreaded )
* In ''WesternAnimation/{{Gargoyles}}'', Coldstone has one mechanical eye with this effect, comprising of a red iris and black sclera.
* Shan Yu of ''Disney/{{Mulan}}'' displays these. Add yellow irises and it's clear they were looking for [[AnimalEyes a falcon look]].
-->'''WebVideo/TheNostalgiaChick:''' Is he suffering from jaundice or something?
* OlderThanTheyThink: the 1949 WesternAnimation/LooneyTunes short ''Bee-Deviled Bruin'' has Papa Bear develop these (white irises on black) after finding out all his attempts to get honey were for naught as Mama had a cupboard full. Actually pretty scary.
* In both ''WesternAnimation/AdventuresOfSonicTheHedgehog'' and ''WesternAnimation/SonicSatAM'', Dr. Robotnik is shown with black eyes and red pupils (in contrast with the Japanese depictions of the character, whose eyes were almost always hidden by ScaryShinyGlasses).
* ''WesternAnimation/StarWarsTheCloneWars'':
** The Son is the AnthropomorphicPersonification of TheDarkSide, and he has {{glowing|EyesOfDoom}}, {{red|EyesTakeWarning}} pupils, surrounded by [[BlackEyesOfEvil pitch-black sclerae, without irises]], and he has a spectacular SanitySlippage through-out the Mortis-arc.
** Mother Talzin of the Nightsisters is a LadyOfBlackMagic with a VoiceOfTheLegion and black sclerae with iridescent irises.
** General Grievous, one of the shows' primary antagonists, sports black sclerae and yellow irises, and his obsession with killing Jedi should make it clear he's a bit messed up in the head.
* In ''[[http://www.youtube.com/watch?v=vhgOAR4Xq4Y Allegro Non Troppo 1]]'', all the animals are brightly colored and cartoony except for those jerkass apes with red eyes and black sclera, [[HumansKillWantonly who are the only ones seen killing other animals on purpose and not for food]]. [[spoiler: They eventually ruin the planet after creating religion, war, and civilization for, despite evolving into humans, they're still vicious, greedy animals]].
* In ''WesternAnimation/ThunderCats2011'' this is {{Downplayed}} with RascallyRabbit the Drifter, who has white iris-pupils on black sclerae. He's merely a frustratingly opaque and {{eccentric|Mentor}} TricksterMentor.
* The redesigned Joker for ''[[WesternAnimation/BatmanTheAnimatedSeries The New Batman Adventures]]'' had black eyes with white pupils.
* In ''WesternAnimation/YoungJustice'', Match, who is a {{flawed|Prototype}}, [[PsychoPrototype insane]] {{clon|ingBlues}}e of Superman, has black sclerae and blue irises. Apart from the black sclerae, he looks exactly like Superboy, the second clone of Superman.
* In the Season 4 finale of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', Tirek has black sclerae and glowing yellow pupils.
* Misery of ''WesternAnimation/RubyGloom'' has black sclerae with white pupils, although she's not evil...just depressing, pessimistic, incredibly unlucky, and with G-rated shades of NightmareFetishist. She enjoys poison herself but is unlikely to offer it to others.
* PlayedForLaughs in the ''WesternAnimation/{{Kaeloo}}'' episode "Let's Play the Quest for the Wholly Gruel", where Kaeloo puts in fully black contact lenses and can't see a thing because of them.
** Played completely straight when she undergoes SanitySlippage in [[spoiler: Episode 100]].

[[folder: RealLife]]
* Chimpanzees have a dark-pigmented conjunctiva, which makes their sclerae look black. Captive chimps that have been mistreated or poorly-socialized are notoriously prone to unpredictable outbursts of violence and destructiveness.
* Black sclerae are actually fairly common in the eyes of apes in general (apart from humans). Most gorillas have black sclerae, but a few individuals have white ones or even a "piebald" combination. It has been theorized that human beings began to favor white sclerae as it helped with non-verbal communication. White sclerae were desired in a potential mate to the point that the genes for black sclera have pretty much disappeared from humans and are now seen as "unnatural" or even [[UncannyValley creepy]]. Hence why this trope and BlackEyesOfEvil even exist.