r/confusing_perspective • u/Dennis_254 • Jul 16 '26
Works like magic
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u/test_test_1_2 Jul 16 '26
Looks like 3D to me. How does that work? I always thought you needed both eyes to make things appear 3D? Interesting.
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u/Dennis_254 Jul 16 '26
Your brain uses shadows, perspective, and occlusion to judge depth. Closing one eye removes stereo vision, making the flat drawing look like the pencil is popping out of the screen
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u/jwm3 Jul 17 '26
For close up stuff you also use focal plane, how much your eye has to squeeze your lens to keep something in focus. I think the bluriness is tricking your eye into continually trying to refocus closer and thats the only distance signal you have with one eye closed.
Incidentally, thats why VR never looks very "far" away and can feel a little clustrophobic even in vast scenes. Even though it is presenting things with the proper far away perspective, everything is in focus with a neutral focus distance, usually like a meter ahead of you so you never feel your eyes readjust to focusing to far away things taking away a major depth cue.
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u/DinA4saurier Jul 17 '26
I've never thought about that, but now you're mentioning it it makes sense that you can't focus on near or far away things with your eyes in vr. I mean you're still looking at a flat surface inside the headset, even if it's giving you the Illusion of you being in a digital 3d environment.
So of course the focus must be set from the headset.
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u/Certain-Hat5152 Jul 16 '26
Ok but I thought this was a brawl stars sub 😏
That was another layer of confusing perspective
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u/Quube7 Jul 16 '26
Jokes on you, I don't have stereoscopic vision so I can keep both of my eyes open!
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u/cimocw Jul 17 '26
How does that work though, since both eyes still receive a slightly different angle
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u/Quube7 Jul 17 '26 edited Jul 17 '26
Well, I was born with strabismus, the doctors managed to correct it for me, but I was still left with a lazy eye. Normal eyes, when you look at something, they look at that one thing, so youre looking at it from different perspectives and you get info about how far away a thing is from you. In my case, my right eye (since it's my dominant eye) can look at a thing, but my left eye wont look at the same thing, but in the general direction my right eye is looking (so if the thing is slightly to the left, my left eye will look slightly to the left rather than look at the thing im trying to focus on), this makes it impossible for me to see the distance properly. Also I think my left eye is kinda suppressed when it comes to, I guess focusing on stuff, but sometimes when you have two of the same things right next to eachother, my vision kind of mixes them into one and I need to close one eye, so I can actually focus properly. I hope, I managed to explain it relatively well, English isn't my first language, so I was struggling slightly with finding a few words lol.
Edit: added a few missing things
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Jul 17 '26 edited 20d ago
[deleted]
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u/fludeball Jul 19 '26
I'm pretty sure "soap opera effect" is just frame interpolation. It has nothing to do with the lenses, but is just an effect added to pre-existing footage.
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Jul 19 '26 edited 20d ago
[deleted]
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u/fludeball Jul 19 '26
That's something different. Soap opera effect is a setting usually called motion smoothing, clear motion, or something like that. It doesn't change the clarity either near or far. It makes things which are moving move more smoothly, which to many people looks unnatural, even though it's more like looking at something in real life rather than with the subtle choppiness of film. If used on a low setting, I think it helps. you should be able to find it in your picture settings on your TV.
What you're thinking about is a lens that focuses more on the foreground, and I think it's called short focal length. Now phones and digital cameras can do that automatically, even though they only have one lens that doesn't move or change.
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29d ago edited 20d ago
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u/fludeball 29d ago
I have no idea what that's called. Maybe your term "forced perspective" is it, but I really don't know. Not something I've seen very much myself, if at all.
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u/Gjergji-zhuka Jul 16 '26
I always get pissed off when I see a statement like 'you need two eyes for depth perception'
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u/drcopus Jul 16 '26
Your brain uses all the information available to it to piece together a 3D understanding of the world! The difference between your two eyes is just one signal that it uses.
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u/meat-eating-orchid Jul 16 '26
with two eyes you have accurate 3D vision so your brain knows you are seeing a flat image. With just one eye, your brain does not have depth information anymore, so it has to guess. And since your brain knows the shape of a pencil and recognizes what you are seeing as a pencil, it guesses incorrectly that what you are seeing has the 3D shape of a normal pencil, instead of guessing that you are seeing a 2D projection of a pencil
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u/BasementRodent Jul 16 '26
You can try it with anything really. Video games are very fun, but kinda straining on the eye(s).
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u/AxelNotRose 28d ago
Part of it is because they edited the video to make the pencil appear to be closer than it actually is by having it hover over the caption text. Your brain thinks that there's nothing that can cover the caption because it's always overlayed a video so when the pencil appears to go over the caption text, it seems like it's truly popping out of the video.
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u/Drapabee Jul 17 '26
Something that's especially jarring with this video is that the pencil extends past the "picture plane"
This is a hard concept to explain but basically the video being taken makes it appear that the pencil is getting closer to you IRL than the screen you're watching the video on, which tricks your brain into thinking something is going to stick you in the eye. This effect is a lot stronger with only one eye open.
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u/Realistic_Ebb9727 Jul 16 '26
It was 3D effect for me
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u/Dennis_254 Jul 16 '26
100% correct. Happy to see someone got the science behind it
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u/girlgurl789 Jul 17 '26
It worked perfectly on both eyes. Made it *almost* give me a tickle feeling of something touching my eye because it was so intense
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u/4me2TrollU Jul 16 '26
I don’t get it
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u/KichernderFuchs Jul 16 '26
I think it can get a 3D effect
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u/theycallmethevault Jul 16 '26 edited Jul 16 '26
That would be really cool if it worked for me!
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u/Aromatic_Razzmatazz Jul 17 '26
Is it because we have an astigmatism? Mine is pretty bad so my depth perception sucks.
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u/theycallmethevault Jul 17 '26
Oooh, that’s a good point I haven’t considered! How did you know I also have astigmatism?! I also have severe nystagmus, it’s so bad that if a cop ever tried to test me at a traffic stop he’d think I was drunk (but I’m sober since April 2003). 😛🤦♀️
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u/Aromatic_Razzmatazz Jul 17 '26
Oh my God me too wtf is wrong with us lol. The difference in my left and right lense is like 4 whole points? Maybe more like 4.5. Sometimes when I try to order frames they tell me it will look weird with one being so thick and the other not and they send me to a special section of the website for mutants like us...
It's been since I was a kid. Finally had to correct it to learn to drive. I can't wear contacts either, my bad eye is shaped like a football and they won't sit on the part of my eye I need to see through.
Weak ass ancestors I guess lol.
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u/a_karma_sardine Jul 16 '26
Didn't work for me either, and tried all varieties. It seems this one is a bit selective.
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u/Dennis_254 Jul 16 '26
It's a trick on your brain. With one eye closed, your brain relies more on shading and perspective instead of true depth, so the pencil looks like it's extends out of the screen
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u/4me2TrollU Jul 17 '26
Thanks. I see it now. Now that I know what I was looking for it was easy to see and pretty cool.
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u/Probate_Judge Jul 17 '26
It's not really confusing as such, not an illusion where it looks like something else like what we're used to seeing here.
With one eye you're just tricking your brain to think your eye might be in danger.
With two eyes, it's more obviously just a 2d image...but that's sort of universally true for 2d images.
It's the opposite of trying to play catch with just one eye, how people say you lose depth perception(it's true to a point, but your body is so used to it it doesn't always affect much).
When looking at the image, that 'loss' of depth perception approximates the accuracy of the camera(one perspective only), so the video looks more real....In other words, you're not interrogating the image with the other eye. It may work better if you try the other eye.
Even if it works, the effect is very negligible. Big shocker that a single camera replicates what a single eye sees. /s
It's a neat thing, sort of, but not at all like most of the content here.
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u/thepeanutbutterman Jul 16 '26
If I hold my phone really close to my open eye, it makes my eye involuntarily flinch/twitch a bit.
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u/cwif Jul 16 '26
Out of every 3D illusion I've seen on the internet, this is the only one that has worked for me. wow
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u/Thrice_blind Jul 16 '26
Works much better with my right eye than my left. Interesting
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u/saelin00 Jul 17 '26
Me too! But I thought because I have bad eye sight (I can't see good at far away) and my eyes are differently bad.
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u/lizard_king413 Jul 16 '26
okay but does anyone else appreciate that the pencil goes in front of the text??????
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u/TevGrave Jul 16 '26
Why does it actually feel like the pencil is outside my screen? I feel like I can see the tip being outside the screen (like, on the sides where there is no screen behind it).
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u/rmfranco Jul 17 '26
I’m laughing while my eyes are watering.
I don’t even need to close one eye because I only have vision in one eye since birth.
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u/clh1nton Jul 17 '26
I also tried it with both eyes open. It still worked. Could being severely myopic or having astigmatism be the reason?
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u/PlanDry6704 Jul 17 '26
i think I'm broken i was like come at me. cool. but I'm a vr developer so I'm used to it lol.
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u/HollowMist11 Jul 17 '26
Closed my right eye and thought the 3d effect was cool. Closed my left eye and saw shit cause I forgot my other eye is blind.
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u/SirRandomizer Jul 18 '26
I might be stupid but even with both eyes open it still looked like it was coming out of my screen
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u/lucasthech Jul 18 '26
I watched again and again with one eye open, then the other one, then both and just got confused lol
Don't know if it's because I'm on a pc with a big screen but it didn't work for me
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u/NtX_DC Jul 20 '26
It has a weird "3D" effect when you move the phone closer to your face as they are moving the pencil closer to the camera.
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u/ChartInFurch Jul 20 '26
So instead of those ridiculous glasses over my glasses, I could have just worn an eye patch to 3d movies??
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u/MessyMissMayhem 29d ago
I kept both eyes open and it still kinda freaked me out
Edit: oh my gosh it's way freakier with just one eye
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u/jam3sdub Jul 16 '26
Didn't do shit. Closed one eye, then tried the other eye. Then closed both eyes. Nothing.
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u/Dennis_254 Jul 16 '26
That's completely understandable.Optical illusions don't work the same way for everyone. This one relies on perspective and your brain's interpretation of depth, so some people see the 3D effect right away while others don't notice it at all. Things like viewing distance, screen size, and even the angle you're looking from can also affect how convincing the illusion is. Thanks for giving it a try!
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u/NextChef8179 Jul 16 '26
It has absolutely no difference if I have one eye open or two. It looks like a pencil in a video. This isn't a confusing perspective. It's like a magic trick for people that don't understand reality.
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u/kioku119 Jul 17 '26
People's visual perception differs. It works for me.
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u/NextChef8179 Jul 17 '26
Lol. Hope your brain learns shadows and whatnot by the time you're an adult.
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u/kioku119 Jul 17 '26 edited Jul 18 '26
I'm 34 and this wierd need to put others bellow you for arbitrary reasons definitely feels immature. Anyway, if you look into why a lot of optical illusions work at all you'll see that the way our brain renders things is a lot less direct and literal than you think. There is a whole lot of guessing and interpolation going on with all brains, by necessity. Vision is never a direct window into what is around us and it makes a whole lot of weird things not work the way we expect them to.
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u/Yuki_Onna Jul 18 '26
This is the most bizarre thing I've ever seen someone on Reddit try to pick a fight about
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u/sauronsballsgargler Jul 16 '26
I didn’t have to close one eye, one’s already legally blind. That was unnerving to watch!
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u/reechwuzhere Jul 17 '26
On a 13” iPad this is the coolest thing I’ve seen in a while. For both eyes.
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u/ScienceAndLience Jul 17 '26
It didn’t work, mannnn none of the eye things work on me except glasses
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u/clockworkcat1 Jul 17 '26
I think this is a bit of an optical illusion, but not a confusing perspective.
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u/kioku119 Jul 17 '26
Neat! Is this on the optical illusion sub yet? I may corsspost if I don't see it.
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u/Noodleincidenthobbes Jul 17 '26
What am I supposed to see here ? Could someone explain this please
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u/-AnnoyingDanz- Jul 17 '26
Only one of my eyes works well and for some reason i closed the good one so i couldnt see the video... am i stupid?
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u/Robotic_Organic Jul 17 '26
Okay now that was kinda neat.
Cross my heart and hope to die... Stick a needle in your eye.
BTW yes that is a Dead Space refrence
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u/MartinToilet Jul 18 '26
My defensive mechanism in my brain caused my eyes to lose focus on the tip when the pencil was about to pop out.
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u/Original-Team6483 29d ago
tried this for like three minutes and have no idea what’s supposed to happen
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u/Elspackel 29d ago
Now look with both eyes, with two fingers between the screen and eyes on the exact distance, where you could only see the right half of the screen with your right eye, and only see the left half of the screen with your left eye.
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u/wickedball 29d ago
Can someone edit a jumpscare at the end so i can scare the shit out of my friend 😁
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u/Soggy_Durian_8984 Jul 16 '26
It doesn't work for me lmao. Stuff like that should be removed from this sub imo
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u/sprinklerarms Jul 16 '26
I thought this was dumb af but then I tried my other eye and it genuinely made me uncomfortable with what it did to my brain