this post was submitted on 14 Jul 2025
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Science Memes

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My time has come!

The above stereographic image is for cross-eyed viewing (most stereograms are wall-eyed, so you may need to put your finger in front of your screen until this one comes into focus)

This is an image of Honolulu, Hawaii, published by NASA. Note Diamond Head (the volcanic crater) in the south.

Here are some other stereopairs published by JPL:


Wheeler Ridge, California


Mount Saint Helens


Salt Lake Valley, Utah


Wellington, New Zealand

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[–] Zacryon@feddit.org 1 points 45 minutes ago

How to make people on the internet staring on their phones like this:

Worked well for me. Cool stuff!

[–] orgrinrt@lemmy.world 1 points 1 hour ago (1 children)

Really can’t seem to understand how this works.

Never did any “magic eyes” or whatever books as a kid, so maybe I just don’t have any practice in this, but whether I try to cross my eyes focusing beyond the screen, or “above” the screen, I can’t get the resulting middle image to look like anything other than a blur.

Perhaps my eyes are somehow odd on the other hand. I don’t need glasses though, so I’m a bit skeptical that’s it.

I tried all the guides I found in this thread, including the floating hot dogs, attempting varying distances both with the screen and the finger, then trying the wall-eyed variants too for all of them, none of them work for me.

So odd. It seems it should work. No idea what I am doing wrong here.

Or is this the joke? To get people to squint for minutes on end on their screen?

[–] HereIAm@lemmy.world 1 points 25 minutes ago

I was gonna tell you it was a meme and they don't actually work. This being in science meme I thought they might actually be stereographic images, but it's from so far away you wouldn't be able to discern any 3D-ness. But I was wrong the height is exaggerated. For me the walleyed version worked for me, I just had to zoom in on one image and hold my phone quite far away.

[–] wolframhydroxide@sh.itjust.works 13 points 10 hours ago* (last edited 7 hours ago) (4 children)

Since some people are apparently rather salty about these being cross-eyed, despite the fact that that's just how NASA made them, here, special for y'all, a selection:

[–] angrystego@lemmy.world 1 points 26 minutes ago* (last edited 26 minutes ago)

Thanks. These are cross-eyed, not the originals. The originals viewed with crossed eyes all made holes out of the mountains.

[–] Persi@lemmy.zip 1 points 49 minutes ago

Thank you, they look amazing

[–] JayDee 1 points 57 minutes ago* (last edited 48 minutes ago)

These ones are... different. When I use these ones the mountain ridges appear to dip inwards? Away from the screen. This was not the case for the ones in the main post

EDIT: I figured out the reason: i'm still going cross-eyed to view them. In the cross-eyed ones, you are taking the left image in the right eye and the right image in the left eye, but in the wall-eyed one you are supposed to take them in reverse. So if you look at the wall-eyed one cross-eyed, the depths are going to all be reversed for you.

EDIT 2: to get the wall-eyed ones to work correctly, I had get a piece of mail and physically seperate my eyes from one another with it. The sensation of going wall-eyed was exactly the same as crossing my eyes, but the results were now correct.

[–] MisterNeon@lemmy.world 3 points 8 hours ago

These are rad. Excellent post.

[–] theangryseal@lemmy.world 2 points 8 hours ago (1 children)

I’m cross eyed. Can’t get a third dot. Boooooooo

[–] wolframhydroxide@sh.itjust.works 2 points 7 hours ago (1 children)

Did you try the wall-eyed versions below? Those should be smaller on a mobile screen, and many people (myself included) find wall-eyed versions easier.

[–] theangryseal@lemmy.world 1 points 1 hour ago

No I didn’t. Thank you. I’ll check it out.

[–] lmuel@sopuli.xyz 18 points 16 hours ago (4 children)

Not sure why but those NEVER work for me lol

Not this, not magic eye books, absolutely nothing works.

Tried for many hours back in the day

[–] AbnormalHumanBeing@lemmy.abnormalbeings.space 9 points 15 hours ago (2 children)

I can only do parallel-view, not crosseyed, those look so surreal that way (inverted height/depth basically)

[–] CoopaLoopa@lemmy.dbzer0.com 2 points 4 hours ago* (last edited 4 hours ago)

Works opposite for me. Cross-eyed versions look correct, and the parallel/wall versions have inverted depth.

Same thing with magic eye images, they're always inverted, like I'm looking into a mold of what the object is supposed to be.

[–] Jikiya@lemmy.world 6 points 12 hours ago (1 children)

Is that why I'm seeing things that way? Don't understand the difference really, but is really odd to see Mt St Helens as a sinkhole instead.

Yupp, I never got the hang of cross-eyed viewing, even with the tips that are around, whereas the "looking through the image" technique is super easy for me, basically just relaxing my eyes. I assume there's people where it is the other way around, and the cross-eyed method works better for them.

Basically it's about which image is transferred as information from which of your eyes, and the two different techniques swap the eyes, which also swaps the 3D depth information.

I love the Wellington here viewed the "wrong" way - like the ocean is a massive plateau surrounding the coast, with that strip of developed area rising like another giant wall.

[–] Angry_Autist@lemmy.world 4 points 13 hours ago

If you have astigmatism or greatly different lens prescriptions per eye, it may be very hard for it to work.

If you do have astigmatism, you can kind of 'squeeze' or scrunch your eyelids down to compensate as you cross your eyes, and it may work better without glasses and closer up

Some people it just never works with

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[–] CromulantCrow@lemmy.zip 28 points 18 hours ago (1 children)

Why do all of these look inverted to me? Like, what should be a mountain is a deep hole in the ground.

[–] dangrousperson@feddit.org 15 points 18 hours ago (5 children)

These are cross-view, your probably using the focus at infinity trick instead.

[–] Lojcs@piefed.social 1 points 1 hour ago

Wow I had no idea it could be done that way. Just tried doing it and the image is way blurrier when 'inverted'. I am near sighted. Does this mean it applies to illusions too?

[–] u_u@lemmy.dbzer0.com 10 points 17 hours ago

Wow, I had the same problem as the one you replied to and I thought you were making a joke I didn't get but I stand corrected. You were absolutely 100% right.

Turns out I was focusing at infinity, didn't even realize it was a different thing than crossing my eyes until I tried to cross my eyes first before focusing on the pictures...

Very cool, thanks.

[–] CromulantCrow@lemmy.zip 2 points 13 hours ago

Yup. That was exactly it. I was thinking "I know how to do these" and not even paying attention to the instructions at the bottom.

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[–] EvilBit@lemmy.world 54 points 20 hours ago* (last edited 20 hours ago) (5 children)

About 21 years ago (😩) I made a stereoscopic photo for some online contest. I was pretty proud of it.

Edit: please ignore the fact that the light doesn’t match between the shots!

[–] Lojcs@piefed.social 1 points 1 hour ago

It is a good one. Although my eyes kept trying to focus on the keyboad and failing

[–] wolframhydroxide@sh.itjust.works 18 points 20 hours ago (1 children)
[–] EvilBit@lemmy.world 19 points 20 hours ago (2 children)

Thanks! It was a pain to set up the little screen trick but for what it’s worth, I won the contest!

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[–] Kolanaki@pawb.social 3 points 12 hours ago* (last edited 12 hours ago)

These are easier for me than normal Magic Eye pictures, because I can just use the "floating hotdog"* method of putting it right up to my face, letting my eyes get used to being focused there and then slowly moving away from it until it pops out of the page/screen.

*(to do the "floating hotdog" trick, put your index fingers end to end then put them right up in your eye line. Now slightly move your fingers apart until the floating hotdog appears)

[–] ter_maxima@jlai.lu 10 points 15 hours ago* (last edited 15 hours ago) (3 children)

These are all backwards. The eyes are reversed so everything that's supposed to be a hole looks like a bump and vice-versa.

EDIT : TIL about cross v wall eyed. I dont understand why they would do it this way though ? The image is much less stable, and moving it at all completely breaks the effect. Wall-eyed really allows you to move and observe details without breaking.

[–] And009@lemmynsfw.com 1 points 4 hours ago (1 children)

Mountains are deep, land is puffy. Weirded out of that was ever the purpose.

[–] HejMedDig@feddit.dk 5 points 13 hours ago

For a lot of people cross eyed views are easier, they would probably give similar complaints for a wall eyed view. It depends a lot on how your eye muscles behave

[–] wolframhydroxide@sh.itjust.works 6 points 15 hours ago (5 children)

You're doing "wall eyed" viewing. These are for "cross-eyed" viewing. "Wall-eyed" means your eyes are focusing at a point behind the image. You need to cross your eyes for these. Try putting your finger in between your screen and your eyes, varying the distance until the dots merge. Then, remove your finger, focusing on the image itself. That should allow for cross-eyed viewing.

[–] Wolf314159@startrek.website 2 points 12 hours ago (2 children)

Focusing at a point behind the image is exactly what we've always done for every other magic eye poster because it only requires relaxing your eyes (staring off into the distance) for the image to pop into focus. Cross eyed viewing is damn near impossible on any screen at less than an arm's length away without significant eye strain or external devices (like the stereoscopic viewers that photogrammetrists would use to view these kinds of images without inducing a migraine) and since the dot is on top holding a finger up as a guide ends up obstructing the entire view unless your arms are growing out of your forehead. The wall eyed view has none of these issues.

I appreciate the post and your effort. But, the images themselves are frustrating and have killed my initial reaction, which was to share them further. Because I'm nearly the only person I know that wouldn't loose interest in the explanation for "correct viewing" half way through. If they were wall eyed stereoscopic images, I could just say "Magic Eye", they'd remember Mallrats, see the schooner, and go "Ooh neat."

[–] macaw_dean_settle@lemmy.world -1 points 6 hours ago

LOL. Cross-eyed viewing is extremely easy and is very easy to do on both a laptop or desktop display as well as a phone. It takes no strain nor do I need any "devices."

These images are easy to see and take no effort. It seems like the issue is with you.

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[–] ayyy@sh.itjust.works 5 points 14 hours ago

The destruction of the coastline in Honolulu is so sad to see :(

[–] kernelle@0d.gs 7 points 15 hours ago (1 children)

I love these so much thanks! On YouTube there's also a ton in video format, like this one by Brian May.

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[–] over_clox@lemmy.world 21 points 20 hours ago (17 children)

Boo, these are cross-view, not parallel-view.

[–] Flames5123@sh.itjust.works 3 points 15 hours ago

I can never get the parallel view to work. My eyes want to focus too quickly. :( cross view is so much easier to me. I wish they came in both all the time.

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[–] SayJess@lemmy.blahaj.zone 15 points 20 hours ago

!crossview@lemmy.world

It’s not very active, but still has good content.

[–] hawgietonight@lemmy.world 12 points 20 hours ago (9 children)

For some reason I'm getting the depth inverted. Mt. Saint Helens looks like a hole in the ground.

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[–] whyNotSquirrel@sh.itjust.works 10 points 19 hours ago
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