Red Eyes, Take Warning in comic books.
- Amulet: Emily's eyes glow red when she uses the titular relic. This is only because her amulet color is pink/red, though, while others have their eyes glow the color of their amulets.
- Animal Man (2011): In the New 52 reboot, Buddy starts to bleed profusely from his eyes, which turn red.
- Arawn: The titular Death-Lord is a violent and destructive warrior whose eyes are perpetually giving off a sinister crimson light.
- Atomic Robo: The Evil Knockoff robot in The Deadly Art of Science has a single red eye in contrast to Robo's two blue eyes.
- Batman:
- It depends on the artist, but the Joker sometimes has red eyes.
- One of the first signs that something is up in Flashpoint (DC Comics) and its cartoon adaptation is that Batman's got red eyes/visor lenses instead of white... because Bruce died that night in Crime Alley, and the Batman in Flashpoint is his father Thomas.
- Once he switched to the various armors he'd use during his time as Batman in Knightfall, Azrael sported red eyes or, Depending on the Artist once he donned the helmet, a red visor.
- Bane's mask has red lenses.
- In The Brute #1 (Atlas Comics, February 1975), the eponymous creature's eyes glow red when a man knocks his friend, Dr. Turner, unconscious
◊. He then kills the man by throwing him against a wall◊. - Catwoman: Guardian of Gotham: The eyes on the evil Batman's suit are always blood red.
- Disney Ducks Comic Universe:
- Donald Duck and his uncle Scrooge McDuck get the red eyes and very scary expressions whenever they get really angry.
- Case in point◊, this picture from The Life and Times of Scrooge McDuck. The creaking sound is Scrooge starting to tear apart a goddamn steamboat with his bare hands when the owner and his mooks trapped him aboard and read out letters revealing his family was broke and his mother had died. The aftermath was likened to being caused by a tidal wave.
- The Demon Etrigan is sometimes presented as evil and sports a pair of red eyes.
- The Flash's various Reverse-Flashes are sometimes portrayed with this combined with Black Eyes of Evil, sporting red irises and black sclera.
- The Hillbilly arc "Red-Eyed Witchery from Beyond" is about a mysterious force that Came from the Sky, turning people into red-eyed "wood-boogers" under its Mass Hypnosis. Ultimately, however, it's unable to override The Hero's cursed black eyes.
- Heroic version: In Last Days of the Justice Society, The Spectre in 1945 has red eyes with skulls as pupils when he tells Harry S. Truman that what's going on with the "rip in the sky" may affect the whole universe.
- Philippe Druillet has the Lone Sloane series. His astronaut Sloane was originally a normal human from 800 years from now. Once he has been taken by the dark god He Who Seeks and dumped in another dimension, Lone Sloane now has incredible powers and red eyes. Living as a space pirate, Sloane is known as the "Red-Eyed Wolf".
- In Max Ride: First Flight, the Erasers — genetically engineered wolf-men sent to capture the protagonists have glowing red eyes. Notably in close up panels, their eyeballs, irises and pupils are shown to be entirely red.
- Mega Man (Archie Comics):
- The Copy Robot in issue 4.
- Mega Man himself as he is infected by Wily's malware.
- My Little Pony: Friendship Is Magic (IDW): Lampshaded in the second story-arc when Applejack spots a group of cute Nightmare creatures, the nearest of which have sparkly red eyes, and she asks Fluttershy for her opinion on their significance:Fluttershy: Possible inherent evil?
- New Gods: Darkseid has naturally red eyes, and when they glow, it usually means he's gonna Omega-Beam your ass.
- Jesse Custer of Preacher gets red eyes when using The Word.
- A trick of the lighting gives Frank Castle red eyes during the events of "Up is Down, Black is White" in The Punisher MAX, moments before he guns down a party of mafiosi. Typically such an act from him wouldn't justify the symbolism, but in this case it represents the Tranquil Fury mixed with Unstoppable Rage that consumes him after Nicky Cavella dares defile his long-dead family's remains on national television.
- ROM (IDW): Inverted for the noble and heroic Knights but played straight for the evil Wraiths.
- Santa Vs. Zombies: The zombies have glowing red eyes.
- Shakara: Shakara's eyes glow a bright red, and he's an unstoppable killing machine on a revenge-driven quest of death and destruction.
- Star Trek (IDW): When Spock is consumed by the Pon Farr in the "After Darkness" arc, his eyes glow red and he seemingly gains super-strength, fighting off three Vulcan guards who attempt to restrain him.
- Star Wars Legends: Star Wars: Legacy has Cade Skywalker, whose eyes turn red when he uses his healing ability. At first, he has to tap into The Dark Side to do it, and every time he does, he gets the red flash.
- Superman:
- Superman's eyes nearly always glow red just before he uses his heat vision in any context, but Superman with BIG glowy red eyes and an angry expression fits this trope and means that someone's about to get seriously hurt.
- Notable examples include For the Man Who Has Everything (to Mongul: "Burn"), JLA/Avengers (in his fight against Thor), and Kingdom Come, where he had to be talked down from murdering the entire UN Assembly in the final chapter.
- Supergirl is more short-tempered and hot-blooded than her cousin. If she gets angry and her eyes glow red, she's about to show why pissing her off is a terrible, suicidal idea.
- In the beginning of the Red Daughter of Krypton story arc, Supergirl's eyes' red glow intensified during her fight against Lobo as she got angrier. At the beginning their eyes give off a faint red light. At the end they pour red fire.
- The cover of the first issue of Supergirl (Rebirth) subverts this: Kara's eyes are glowing red, but she looks happy.
- In Elseworld's Finest: Supergirl & Batgirl Supergirl's eyes glow red when Lex Luthor finally pushes her over the edge.
- Played with in the start of Supergirl: Cosmic Adventures in the 8th Grade. Kara is harassed by reporters as soon as she arrives on Earth. Her eyes give a red glow, which usually is a sign that she's about to blast something. However it is her X-ray vision which starts acting up.
- In Bizarrogirl, Supergirl's eyes glow red when she faces a monster which has just eaten Bizarro Luthor, telling it better spits his victim out... or else.
- Perhaps Superman's best display is when Darkseid apparently kills Supergirl in The Supergirl from Krypton (2004) arc, and Superman, after shedding some tears for his cousin, dons his red eyes of doom and gives Darkseid the beatdown of a lifetime.
- In War World, Superman fights an Evil Twin whose eyes glow red permanently.
- Superman: Brainiac:
- When Steve Lombard flirts with Lois, Clark's eyes glow red briefly. A second later, Steve's chair suddenly collapses.
- When Brainiac declares that all people he has abducted belong to him, Superman's eyes glow red before he blasts Brainiac's face.
- In Crucible, Roho taunts Supergirl by mocking her friends. Immediately Kara's eyes turn red and pour red flames before she unleashes her heat vision while shouting she will burn him and his allies.
- Whatever Happened to the Man of Tomorrow?: When the Legion of Super-Villains gloat about killing Lana Lang, Superman's eyes turn glowing-red. He looks so utterly murderous the trio of villains take off running.Superman: YOU HURT LANA?!
- Subverted in Lex Luthor: Man of Steel. Superman is always presented with red eyes, but it's due to Luthor's Unreliable Narrator perspective. And the fact that whenever Superman and Lex Luthor are face-to-face with each other, the reason behind Superman's glowing, angry red eyes is usually because Luthor's just done something utterly monstrous and gotten away with it.
- Usually Superman's eyes heat up when he's justifiably angry or serious but at the other end of the spectrum, when the Joker possesses Superman in Scott Snyder's Batman: Endgame, the glowing red eyes and toothy smile make Clark absolutely terrifying◊ to behold.
- In Last Daughter of Krypton, Kara's eyes give off a sizzling, red glow before she unleashes her heat vision for the first time and blasts a hole in a robot attacking her.
- Day of the Dollmaker: When one of the killer dolls sent to Catherine Grant recognizes Toyman's voice pattern, its mechanical eyes turn red. Then it grins maniacally and stabs Winslow's chest with its scissors.
- Doomsday's eyes are naturally red. As if all those Spikes of Villainy aren't enough to send you running.
- Lover Boy in The Switch Electricia has eyes that glow red when he uses his hypnosis.
- In Tangled: The Series, Danielle gains red eyes (and red sclera) after she takes the scepter.
- Trakk: Monster Hunter: Several, but not all, of the monsters Vaquoul makes have red eyes.
- The Warlord: The Evil Sorcerer and Hot Witch Motala has pupilless eyes that glow red.
- According to the Marvel handbook, this should be the case for Werewolf by Night: his eyes are yellow when he is transformed and fully in control of himself; when he transforms involuntarily and becomes a dangerous, wild animal, they are red. Unfortunately, the colorists don't quite adhere to this, and the two often get switched around.
- Captain America has these at the end of a What If? issue. He's pretty pissed at that moment.
- Wonder Woman:
- Wonder Woman (1987): Ares' eyes are almost always glowing red, and in his iconic get up are the only part of him actually visible, glowing ominously from the dark shadows underneath his helmet. He is also incredibly dangerous — even during periods when he's ostensibly allied with the good guys, he's still an unrepentant killer on a global scale.
- Wonder Woman (2006): Stalker's red eyes are a visible side effect of having traded his soul to a demonic entity ages ago for power.
- X-Men:
- Magneto is sometimes drawn with these, or Blank White Eyes befitting his Anti-Villain nature.
- Cyclops actually gets these eyes when is he depowered or actually in control of his power unlike most of the time. Though given the risk factor, Scott would still have to wear the shades anyway.
- Wolverine is a trope codifier of this, he especially gets a lot of these under Jim Lee's penciling. One of the best Wolverine examples is seen during flashbacks while wearing his red-visor helmet in Weapon X (1991), when donning his more serious red-lensed X-Force uniform to 'get down to business', and most notably (albeit inconsistently) when entering into his infamous berserker rage.
- Once,note while Logan is guest-instructing a group of young X-Men in a special Danger Room training session, he senses the disturbing presence of a dark and malevolent wraith. Knowing that the children are in very real danger, he tells them that they need to immediately run for the exit as soon as he gives the signal. After Wolverine quietly stalks and then confronts the wraith in an explosive blood-haze, with his wild mane standing completely on end, and bellowing a furious primal roar, the kids bolt for the exit. At first looking over her shoulder and then stopping to witness the incredible scene taking place in the distance, the child narrator comments that Wolverine's anger is in fact so palpable that you can not only feel the savagery emanating from him, but also see it radiating in visible waves of enraged madness. In response, the now terrified evil spirit cannot leave the Danger Room fast enough, and in comedic haste, it flies out of the X-Mansion and disappears into the distant forest. When questioned by the X-Kiddies as to what exactly that was all about, Wolverine replies: "We was just dealin', ya know, and I guess he couldn't hack it."
- Also from the Weapon X Program, there's Omega Red and Maverick.
- Mr. Sinister has these, along with a vampire tan.
- Depending on the Artist (or moment), Apocalypse and Cable's Evil Twin Stryfe have red eyes.
- Gambit has got red irises◊ as well as black sclera and it's the reason he was abandoned as a child. Though fortunately for him it's a very mild mutation compared to his fellow X-Men.
- Gambit's red eyes only actually came in later, as they were originally white and his kinetic energy was green before it became magenta.
- X-23: If Laura's eyes turn red, run. Run away very fast. It means she's under the effects of the trigger scent and you're about to die a horrible, meat confetti death.
- Magneto is sometimes drawn with these
