->'''Pete''': So you're telling me you never once [[MythologyGag looked in the girl's locker room]]?
->'''Clark''': [[PowerPerversionPotential Well, maybe once]].
-->-- ''{{Series/Smallville}}''

A power that lets one see through almost anything. It can usually be turned on or off at will, and the objects that you can see through and how far you see through them vary.

How the power actually ''works'', especially if it's implied to be actual X-rays, is confusing. Whether your eyes or your glasses are sensitive to X-rays, you would still need a powerful X-ray source on the other side of whatever you were trying to see through, and even then you'd only see things that were X-ray opaque. Presumably you'd "see" things thus revealed in a "colour" for which we normal, X-ray-blind people have no name.

X-ray scopes, goggles, visors and what-have-you are perennially popular items in video games. Sometimes this has unintentionally humorous effects, as when some character's repel-everything super armor turns out to be completely radiotransparent, allowing you to see his/her skeleton beneath.

In the real world, there is a technology called "[[http://www.epicwest.org/privacy/airtravel/backscatter/ X-ray backscatter imaging]]" which allows for a certain amount of selective viewing. However, it requires bulky beamshaping equipment around an X-ray tube, which is of considerable size, not counting the high-voltage power supply and water-cooling system to keep from melting the tube's cathode. And then you have to scan the beam across the target, and use large and heavy detectors to pick up the extremely faint backscattered X-rays. The smallest mobile X-ray backscatter (not counting "portal"-style backscatter machines, which can cheat in a number of ways) machine is built into a ''20-foot shipping container''. It isn't impossible to miniaturize a backscatter machine, but it would take a whole lot of really surprising breakthroughs in a whole lot of scientific fields.

Also, all those X-rays would kill most people due to all the exposure to that much radiation. Given this, the common usage of X-ray vision for [[PowerPerversionPotential voyeuristic purposes]] has even worse implications than invasion of privacy--it's downright dangerous to the people who are being ogled.

See also: SuperSenses. Similar to VeinOVision and VolcanicVeins.



[[folder:Anime and Manga]]
* Characters with the Byakugan power in ''Manga/{{Naruto}}'' (Hyuuga family members) have general all-purpose awesome vision, including the ability to see people through objects. Used mostly to see [[KiAttacks chakra lines]], it's also been shown to allow vision of a person's skeletal structure, and [[PowerPerversionPotential fans have speculated]] that it might have... other advantages (and [[http://totallyshoot.blogspot.com/2012/02/totally-shoot-comics-naruto-byakugan.html disadvantages]]).
* When Shiki in {{Tsukihime}} concentrates in the right way, he can see through things like skin in order to 'kill' tainted blood as it moves through his veins. Doing this too hard leaves him almost entirely blind for a period, during which all he can see are lines and points of death.
* Some kinky FanArt for ''DennouCoil'' tends to reverse this, using the city's augmented reality glasses to cover some streaking girls -- that is, the girls are using augmented reality to make them ''look'' like they're wearing clothing to anyone wearing the AR glasses (i.e., everyone), when in reality they're, er, [[DontExplainTheJoke not]]. This means that to see "through" clothing, you have to take the glasses ''off''.
** An example from [[http://danbooru.donmai.us/post/show/365926/dennou_coil-glasses-glasses_view-okonogi_yuuko-rev Siraha]] and another from [[http://danbooru.donmai.us/post/show/310151/3girls-amasawa_yuuko-bare_shoulders-blush-brown_ha Kakkii]] here (and see-through [[http://danbooru.donmai.us/post/show/311801/amasawa_yuuko-dennou_coil-digital_dissolve-glasses here]] with BarbieDollAnatomy underneath) -- mostly tame pictures, but definitely a '''NSFW''' website. This has even gained it's [[RuleThirtyFour own tag]] on the Danbooru system -- "Reverse X-Ray".
* Kogarashi's "Maid Guy Scan" ability in ''Manga/KamenNoMaidGuy''. He ''does'' use it to see through girls' clothes, but only with good intentions...such as telling his master, Naeka, that she needs to lose some weight. Nobody really likes it when he does this.
** Particularly because the ONLY people he really uses this is on women.
* One chapter of ''ToLoveRu'' has Rito put on a special pair of glasses that Lala uses to work on her inventions. As this is ''[[{{Ecchi}} To Love Ru]]'', the glasses just happen to make him see through women's clothing.
* Natsume from ''SenkoNoNightRaid'' mostly uses his ability to scout or see through rooms in spy missions. The power and distance is affected by moon phases- it is at its weakest in the new moon.
* Mii Konori from ''Manga/ACertainScientificRailgun'' has this ability. She usually uses it to scan her opponents for concealed weapons.
* Viola from ''Manga/OnePiece''. She ate the Giro Giro no Mi (Glare-Glare Fruit), which allows her to not only see through peoples' clothes and skin, but into their minds, as well. She also can see things from all the way across an entire island as well as being able turn her tears into large, hot iron whales to attack her opponents (because of [[RuleOfFunny a pun in Japanese]]).
* In ''Manga/AkameGaKiru'', the AxCrazy SerialKiller Zank the Beheader has several vision powers, including X-Ray Vision. He uses it to see Akame in her underwear while fighting her, but he only comments that she doesn't have any concealed weapons.

* ProtoSuperhero Olga Mesmer, The Girl with the X-Ray Eyes, appeared in a pulp magazine comic strip from 1937-1938. Although lacking a secret identity, she had Super Strength as well as X-ray vision, so is sometimes considered a precursor to Superman.
* Comic book {{Superman}} looks at a wall and sees Lois, in natural colour, tied up behind it. Or he sees a bomb inside a ship that he's swimming past. Apparently, his eyes emit something that goes right through masonry or steel, but bounces off skin, clothing, dynamite, etc. at wavelengths that look just like ordinary light. However, like real X-rays, it's stopped by sufficiently dense materials (although, [[TheSilverAgeOfComicBooks Pre-Crisis]], ''only'' lead stopped it).
** One HandWave for this is that it's not X-rays, but actually a combination of his telescopic vision and microscopic vision; he looks ''between'' the molecules of whatever he's looking through. To which those with even a passing understanding of what ''makes'' an object opaque in the first place will say: No.
*** Unless, of course, he's also a [[WindsOfDestinyChange probability warper]] at a quantum level...
** Another ties into the "psionic Superman" explanation that was quite popular a couple decades back (and which seems to have influenced the John Byrne reboot). This one posits that it's actually a form of clairvoyance, and that its inability to go through lead is merely a psychological limitation.
*** That's just using a different word. It in no way helps clarify how it works.
** Another post-Crisis theory says that he can detect the minor electromagnetic energy emitted when cosmic ray particles pass through matter, and his brain just interprets it as a visual image subconsciously constructed from the energy patterns. These emissions might be partially blocked by lead (or any sufficiently dense material).
** However, in TheGoldenAgeOfComicBooks and at least part of TheSilverAgeOfComicBooks, it was definitely X-rays. In fact, this is where his [[EyeBeams heat vision]] originally came from; he was able to focus the X-rays enough to cook whatever he was looking at. Or in one Superboy comic, turn gold into lead. One odd side-effect of this was that, until the PostCrisis reboot, his heat vision couldn't melt lead. (This ignores the fact that an actual beam of highly focused X-rays could in fact melt lead, if it were sufficiently intense.)
* ''ComicBook/SupermanSecretIdentity'' is a {{Reconstruction}} or one extended ThisIsReality take on Superman, and it approaches this power the same way: he only uses it on humans when he really, really needs to, because while he doesn't know exactly how it works, he's aware that blasting people with X-rays would be very bad for them.
* "ComicBook/MartianManhunter has "Martian Vision" which works like this DependingOnTheWriter
* Ultra Boy of the Comicbook/{{Legion Of Super-Heroes}} originally had this as his only power, but was later upgraded to "Any of Comicbook/{{Superman}}'s powers, but only one at a time".
** Note that originally the wrinkle was that he ''could'' melt lead, unlike Superboy (see above), which humorously led some writers to have him do nothing ''but'' melt lead just to drive the point home.
* British juvenile comic character X Ray Specs sometimes sees other people as skeletons, sometimes not. Sometimes he sees the crucial thing at the right time, sometimes not.
** Ray's specs had an interesting power if he looked through the front of the lenses: he could then see, for example, a skeleton as it looked when it was alive. In other words, a sort of reverse x-ray.
* DCComics character 'ComicBook/{{Hitman}}' tried out for the Justice League once and was rejected. He said that he hadn't expected to get in, he just wanted to get a look at WonderWoman with his X-Ray Vision. He left with a leer.
* ''Comicbook/{{Empowered}}'''s supersuit has "imaging functions" which, among other things, grants her this power. It's detailed enough to detect an aneurysm in the head of the PunchClockVillain who was guarding her, [[spoiler:which saves his life]].
* One character in ''Target Comics'', the White Streak, had x-ray vision.
* An extremely disturbing use in ''SupremePower'' where Mark Milton goes to a strip club, takes a woman home, and has sex with her - while having his x-ray vision on enough to see her bones and muscles beneath the skin. Mark also used to use it to spy on girls in high school.
* A pair of x-ray-specs is the first of his parents' gadgets that Chase finds in ''Comicbook/{{Runaways}}''. Naturally, he realizes what they do by seeing Nico and Karolina in their underwear.
-->''What is it, Chase?''
-->''What do those things do?''
-->''Nothing. Nothing at all.''
* The protagonist of ''StrontiumDog'' is able to emit α particles from his eyes, which somehow allows him to see through walls and metal.
** α particles are helium nuclei and can be stopped by ''paper''.
* Vartox, as the AlwaysSomeoneBetter to Superman, has x-ray vision that can see through lead.

* In ''Film/XXx'', Xander has a pair of X-ray binoculars with a built-in digital camera which can see through anything from [[FanService clothes]] to brick walls, depending on what the viewer focuses on.
* The movie ''X! The Man With X-Ray Eyes''. The main character takes eyedrops to increase the frequencies of light that he can see; he goes from seeing everyone with no clothes on to seeing organs to seeing skeletons to seeing a monster at the center of the universe. He attempts to stop it by [[EyeScream gouging them out]] but in an alternate ending (which may or may not be an UrbanLegend), he can still see.
* ''Film/RoboCop1987'' has a thermal scanner built into him that allows him to see through walls and identify targets. He only uses it in one scene, though.
* Film/JamesBond gets a pair of X-ray glasses in ''Film/TheWorldIsNotEnough''. He uses them in a casino both to see who is armed and to [[PowerPerversionPotential check out the underwear]] of the [[FanserviceExtra lovely ladies]] present.

* In the ''{{Literature/Alterien}}'' series, Oberon discovered early on his ability to see through solid objects. There are no x-rays involved in an Alterien's ability to see through people and walls. Oberon calls it 3D sight.
* The high spirits of ''Literature/AstralDawn'' can see in a manner similar to x-ray vision. The high spirits don't see with physical eyes, but with their minds. This gives them the ability to perceive the world in many ways mortals cannot, including seeing through walls simply by imagining they aren't there.
* ''The Life and Times of the Thunderbolt Kid'' by Creator/BillBryson. Young Bill recounts how Superman's x-ray vision isn't an actual x-ray, more of cross section, and how even that was useless for looking through women's clothing as breasts would be restrained by bras and other articles of clothing. Therefore Bill developed "Thundervision" which was able to loosen restrictive clothing while looking through it.
* In the ''{{Literature/Lensman}}'' series of classic space opera, several extraterrestrial races (and all entities of sufficient mental development) have something called just the "sense of perception", apparently the author's take on the ultimate implications of Rhine's roughly contemporary ESP experiments. SoP penetrates anything except thought-shields, to any depth the perceiver chooses to focus on, can take in detail down to the molecular level, and has range limited only by the mental capacity of the user. The Arisians, the Elder Race and ultimate mentalists of this background, routinely use their sense of perception to observe objects in other galaxies.

[[folder:Live Action TV]]
* ''Series/{{Smallville}}'' manages to use this properly. More or less. Clark's vision is indeed similar to X-rays, barring a few occasions involving girls' locker rooms which are mostly [[RuleOfFunny played for laughs]]. The lack of any kind of contrast invalidates it slightly, but it still makes more sense than the classic comic-book version.
* In the 1980s ''Series/TheTwilightZone'', some kids catch a leprechuan and force him to grant their wishes in exchange for freedom. One wishes for X-Ray vision. Of course, when he tries to see through girl's clothing, all he sees are their bones and organs, like a real X-Ray machine.
* Similarly to above deconstructed in ''DossierOnDetectiveDubrovsky''. A psychic admits that he can see through things but when his female listener is disturbed (or [[FetishFuel aroused]]) by this prospective he sorrowfully assures her that instead of all the good parts he can only see bones, organs and the bowel's contents.
* In {{Series/Misfits}}, this is Jess's power. [[PersonalityPowers She was tired of people lying to her, and learned to see through all the bullshit, so gained the power to literally see through things.]]
* {{Justified|Trope}} in ''Series/{{Intelligence|2014}}''. What Gabriel is actually doing is using [[BrainComputerInterface the chip]] to interface with spy satellite telemetry and/or wireless-enabled security systems, which the chip and his brain render as the ability to see through walls. No satellite or camera and his sight's no better than an ordinary human's.

* "X-Ray Eyes" by Music/{{KISS}}.

[[folder:Tabletop Games]]
* In ''TabletopGame/{{Space 1889}}'' a possible invention is a heavy, energy consuming machine that lets you decide what you want type of materials you want to see through.
* A classic magic item in ''TabletopGame/DungeonsAndDragons'' is the Ring of X-Ray Vision. Tends to traditionally come with complementary fan speculation how people in a fantasy setting would even know what x-rays are, but it does let its user see through walls and such. (Several detection spells are also frequently blocked more or less effectively by solid materials depending on their type and thickness, with lead usually being best and thus suggesting that, say, the magic used by a Detect Evil spell may also have some characteristics in common with "hard" electromagnetic radiation.)
* Naturally, most superhero games feature this as a possible power, and usually as one that's treated as explicitly distinct from, say, clairvoyance. The ''TabletopGame/HeroSystem'' has its generic "N-Ray Vision", ''TabletopGames/MutantsAndMasterminds'' lets you enhance a character's vision with "Penetrates Concealment", and so on.

[[folder:Video Games]]
* In ''WorldOfWarcraft'', engineers can make Gnomish X Ray Specs which can see through other players' clothes.
** Armor, but not undergarments. Not that this helps much with the "GAAHH! NAKED DWARF!" reaction.
* ''{{Metroid}}'': Samus can gain X-ray vision as a powerup to let her see through false floors. In the ''Prime'' subseries she can also use this to find enemy weakpoints and track invisible enemies. ''Prime 3'' lets you kill many tough enemies in a single blow if [[ForMassiveDamage you find their weakpoint]]!
** Also, one of the few ''somewhat'' realistic portrayals. X-ray vision mode is bright and white, similar to what X-ray scans look like, and is anything but regular-colored that someone like Superman sees in. You can also see the internal structure of things; like Samus's hand inside her ArmCannon.
* Done a bit better in the video game ''VideoGame/GoldeneyeRogueAgent'' with M.R.I. (Magnetic Resonance Imaging: http://en.wikipedia.org/wiki/MRI ); this vision mode allows you to see the silhouettes of enemy (and allied) soldiers through walls in a vaguely transparent white, but no more detail than that. It still doesn't work like it should, though...
* The video game ''VideoGame/{{Nightfire}}'' has a blue tinted heat vision vision mode that gives enemy's silhouettes in misty red past obstacles. It works through solid stone walls and functions in ways typical of "x-ray" vision though.
* ''VideoGame/DeusEx'' and sequel has a vision augmentation that allows first night vision and then the ability to see people and animals though walls as figures made of white smoke.
* ''VideoGame/BatmanArkhamAsylum'' has 'detective mode' which lets you see enemies and NPC's as skeletons some distance away and though walls. It also shows important items and breakable walls.
* Early in ''VideoGame/QuestForGloryII'', you can buy a pair of "x-ray glasses" (shaped like funny nose glasses) from the magic shop. Putting them on does nothing but display the message "everything looks like you're looking through a veil" and cause the magic shop owner to laugh. This, however, is also a vague clue to an EasterEgg: near the end of the game, a young woman has to change her clothes and steps behind a gauzy veil that's "just opaque enough to keep any would-be peepers from seeing anything fun". Putting the glasses on at this point turns the veil completely transparent.
* In ''VideoGame/PerfectDark'' there is an item called the X-Ray Scanner that can see through walls. One of the weapons (the infamously overpowered [=FarSight=]) is a railgun with one of these scanners built into it.
* ''VideoGame/WarioMasterOfDisguise'' parodies this with a treasure called the 'Forever X-Ray Glasses' From the description:
** ''This amazing treasure lets you look through absolutely everything...which means that you end up seeing NOTHING AT ALL! Think about it. "

[[folder:Web Comics]]
* Tedd's glasses in ''Webcomic/ElGoonishShive'' had an "X-Ray" feature, designed specifically to see concealed weaponry. Whether they worked with actual X-rays, we don't know, since he removed the feature -- Tedd is a [[ChivalrousPervert pervert, but]] he's against "[[http://www.egscomics.com/?date=2003-04-23 this kind of voyeurism]]". Later a guard at some MIB facility [[http://www.egscomics.com/?date=2009-12-29 used much the same]] to check agent Wolf.
* Vriska and Rose both have this in ''Webcomic/{{Homestuck}}'', Rose gets hers from being the Seer of Light and Vriska has it from her Vision Eightfold.
* In ''Webcomic/{{Freefall}}'', Ab[[superscript:2]]y is specifically said to be [[http://freefall.purrsia.com/ff1500/fc01407.htm backscatter X-Ray equipped]]. We never see the world through his eyes, but given how [[MohsScaleOfScienceFictionHardness hard]] Freefall usually is, we can assume that it works realistically.
* ''Webcomic/SchlockMercenary'' obviously is hi-tech enough for this, and the resident MadScientist [[http://www.schlockmercenary.com/2004-11-21 got such glasses]].
* ''Webcomic/NerfNow'' explains about "[[http://www.nerfnow.com/comic/784 Engievision]]":
-->'''Engie''': Didn't you notice the goggles we engineers are always using? Here, give it a try!
* ''Webcomic/{{Waterworks}}'': One of the abilities of Slick's diving suit. It's a little more realistic than usual; if there is no x-ray source in the vicinity, the suit [[http://mspfanventures.com/?s=43&p=336 releases a lot of x-rays to compensate]], which tends to be harmful to all life in the vicinity.
* ''Webcomic/{{CyanideandHappiness}}'' takes it to its logical conclusion in this [[http://www.explosm.net/comics/1325/ deconstructive parody.]]

[[folder:Web Original]]
* Mitch Calrus of ''Literature/FineStructure'' has this superpower along with [[IntangibleMan intangibility]].
** This uses some kind of four-dimensional light, and he can control how far he sees. Great for voyeurism if you happen to be into women's cross-sections. Mitch isn't:
--->"I can't just look at the skin below the clothes. I can't just peel away layers like that. It's a focus depth thing. And people just look red on the interior. Icky red and other nasty colours. Watching blood circulate isn't fun, it's horrific."
* In NewVindicators, a few characters have this power, including Sclera and Iris, brother and sister Neo-Sapiens with the power to see through anything. Unfortunately, they see through their own closed eyes, which led to early insomnia and their father would make them train in martial arts until they simply passed out from exhaustion.
* At the [[SuperHeroSchool Whateley Academy]] in the webfiction ''WhateleyUniverse'', there's a boy code-named Peeper. His ''only'' power is the ability to stare at people and look through their clothes. Maybe he could do something interesting with locked boxes or what-have-you, but he's not interested. This makes him one of the most annoying pains on campus, as he's constantly annoying the hot girls.
** In his combat final, we learn that he can also see through things like the fake rocks people use to hide door keys, so he can get into a lot of people's houses too.

[[folder:Western Animation]]
* ''SupermanTheAnimatedSeries''. When he showed it to Lana Lang...
-->'''Lana''': So, how many times have you peeked into the girls' locker room?
** In one episode he manages to fry some aliens with it. And since [[WhatMeasureIsANonHuman they didn't look remotely human]], he was perfectly okay with [[ThouShaltNotKill killing them]].
* The M-Ray Contact Lenses gadget on ''TotallySpies'', so-called because they were supposedly designed for seeing through metal, but could be used for seeing through anything, like brick or concrete, or even like telescopes for reading tiny writing from across the room.
* Captain Hero in ''DrawnTogether'' has this power. In one episode, he used it to spy on Foxxy, which resulted in her getting a brain tumour.
* PowerpuffGirls
* See-More, a H.I.V.E. Five villain in ''WesternAnimation/TeenTitans'', has X-ray vision that lets him see through Starfire's clothes, which causes her to "cover" herself in embarrassment.
* The title characters of ''PhineasAndFerb'' make X-Ray glasses on one occasion. They try to mass-produce them, but [[ItMakesSenseInContext their carrot supply winds up mysteriously disappearing]].
* An episode of {{WesternAnimation/Futurama}} involves Bender using X-ray sunglasses to cheat at poker.
* In ''WesternAnimation/SupermanBatmanPublicEnemies'', Toyman mentions an [[NoodleIncident offscreen incident]]:
--> Hey, did you guys see ComicBook/PowerGirl when you came in? When you see her again, tell her I said [[PowerPerversionPotential sorry about the X-Ray goggles]].... ''(he puts on a pair of [[PervertRevengeMode now-broken]] goggles)''

[[folder:Real Life]]
* Adverts in comics for X-Ray Specs. Okay, any boy stupid enough to part with money in the hope of seeing through girls' clothes deserves to be ripped off, but shouldn't enough people have "seen through" this con by now and let the sellers go out of business?
** You can buy those cheap in novelty shops. Yes, they still don't actually work, but then it's a novelty item, so you shouldn't expect too much.
** Some apps for mobile phones feature the same thing, saying they'll convert the camera of your cellular in a X-Ray one. Same as per X-Ray goggles mentioned above.
* TruthInTelevision. During the ColdWar the [[MoscowCentre KGB]] invented an X-ray device so powerful it could show the inside of a lock, enabling a safecracker to see the movement of the tumblers. Unfortunately the device emitted powerful bursts of radiation when being used -- KGB agents would joke that you could tell a veteran safecracker by his lack of teeth!
* [[http://en.wikipedia.org/wiki/Backscatter_X-ray Backscatter Technology]]
* You can't simply press a button on Photoshop to do this ([[PowerPerversionPotential yet]]), but you can do [[http://www.metacafe.com/watch/400249/photoshop_x_ray_trick_see_through_clothes/ something similar]] if the subject in the photo is wearing light and thin clothes.
* One reason that airport security scanning technology is controversial is that some versions, in scanning a would-be air traveler for concealed weapons, generate a solid-looking image of their body shape that's detailed enough to show breasts, buttocks, and hints of genitalia.

* ''{{Franchise/Bionicle}}'' has the [[MaskOfPower Mask of X-Ray Vision]]; Kanohi Akaku or just "Akaku" for short.
** The Great Ruru also has this.