'''Basic Trope''': A character with red eyes has a high probability of being evil.
* '''Straight''': Lord Bloodstone has red eyes and is the villain of the story.
* '''Exaggerated''':
** Lord Bloodstone has red eyes and GlowingEyesOfDoom. Thus, Glowing Red Eyes of Doom, Take Warning. He's also the main villain.
** Alternatively, Lord Bloodstone's eyes are completely red, [[MonochromaticEyes including his scleras and pupils]]. He's the villain of the story.
* '''Downplayed''':
** Lord Bloodstone has bloodshot eyes.
** Lord Bloodstone's eyes are an unusually bright coppery brown.
** The character with red eyes is a JerkAss but not outright evil.
** Jack has red eyes and is TheHero, but GoodIsNotNice.
* '''Justified''':
** Lord Bloodstone is an EvilAlbino.
** Alternatively, all those who are granted power from a sinister source, such as a demon, have their irises stained red by it.
** Everyone has ElementalEyeColors, and pretty much everyone who gets [[PlayingWithFire fire]][[note]]Since FireIsRed[[/note]] is guaranteed to either become corrupt or just be a {{pyromaniac}}.
** Lord Bloodstone [[VillainousBreakdown is so angry]] that he actually burst a couple of blood vessels!
* '''Inverted''':
** Lord Bloodstone has InnocentBlueEyes.
** [[IncorruptiblePurePureness The incorruptible prince Strongheart]] has red eyes.
** [[DeathbringerTheAdorable Rogue]] is a HeroicAlbino who [[HeroWithBadPublicity often gets shunned]] because [[WrongGenreSavvy people think his red eyes are scary]].
* '''Subverted''':
** A character with red eyes claims/tries to be dangerous, but is just too incompetent to pull it off.
** A character with red eyes is established as dangerous, but turns out to be the hero.
* '''Double Subverted''': But it turns out that the hero is actually TheManBehindTheMan.
* '''Parodied''':
** A character puts in red contact lenses. They immediately go on a killing spree.
** Lord Bloodstone routinely douses himself with pepper spray to ensure that his eyes stay red when he does something evil.
** Lord Bloodstone wakes up with a hangover one morning. [[BreadEggsMilkSquick He staggers to the fridge, gets a glass of lemonade, and blows up his neighbor's house]]. [[AGlassOfChianti He laughs evilly while sipping the lemonade]], [[GlowingEyesOfDoom his eyes glowing]].
* '''Zig Zagged''': Lord Bloodstone is [[EstablishingCharacterMoment initially established]] as a {{pyromaniac}} BloodKnight, but he also has HiddenDepths, being a GoodSamaritan who would give you the shirt off his back. Just [[BewareTheNiceOnes don't get on his bad side]].
* '''Averted''':
** No-one has red eyes.
** A character has red eyes, but they do not really signify a certain trait.
* '''Enforced''': "Let's give the BigBad red eyes so he can be identified as the villain."
* '''Lampshaded''': "So you're behind this all? I should have known since the moment I looked in your evil red eyes."
* '''Invoked''': Albinism is fairly common in the setting. The BigBad spreads a rumor that any child with the trait is destined to become evil; that way, he ensures that he will always have a supply of hated and feared minions with nowhere else to go.
* '''Exploited''': Prince Strongheart needs to pass for evil, so he gets himself a pair of red contact lenses.
* '''Defied''': "My eyes may be red, but my heart is pure!"
* '''Discussed''': "So, are red eyes a requisite for villainy?"
* '''Conversed''':
** "Why do such a high proportion of evil-doers have red eyes?"
** "He must be the bad guy. Just look at those eyes."
* '''Deconstructed''': Lord Bloodstone was hated and feared ever since he was a child because of his sinister-looking eyes. The abuse he suffered twisted him into the villain that he is today.
* '''Reconstructed''': Lord Bloodstone was hated and feared ever since he was a child because the power of the Demon King that dwells within him, and people felt inherently afraid of him. As he grew more twisted and bitter, his eyes became redder, a sign of the Demon King gaining control. The hero has the same power, but maintains his heroic nature, and so his eyes are an untainted blue.
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%% Optional items, added after Conversed, at your discretion:
%%* '''Implied''': ???
%%* '''Deconstructed''': ???
%%* '''Reconstructed''': ???
%%* '''Plotted A Good Waste''': ???
%%* '''Played For Laughs''': ???
%%* '''Played For Drama''': ???