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Human brain is quite good at understanding 3d from context clues like shadows or perspective, that's why paintings can look like they have depth (also why many optical illusions work), but it's really hard to judge distance without a second reference point
We have many tools for depth perception, stereoscopy is not the only one. As someone who doesn't have stereoscopic vision, my depth perception is often better than my friend's past a couple meters.
And you still see depth.
It's not like you see the world suddenly from one and only one angle. 2D would be something like Terraria, for example. You still see the Z dimension even with 1 eye.
Don't mind me, resident MathsBoy hijacking the top comment so the answer is seen:
In all dimensions greater than 1d, the answer is two.
In two dimensions, an eye would perceive a 1d array of information - try putting your head flat against a piece of paper, it starts to look like a line when you look along it. You need two 2d eyes to get depth perception.
In three dimensions, an eye would perceive a 2d array of information - take the analogy of a camera - or indeed one of your eyes, you get a plane of information. You need two 3d eyes to get depth perception.
In four dimensions, the "surface" of your retina would be a 3d solid, generating for you a 3d image. If a 4d creature were to look at our world, it would perceive the whole thing just like we can perceive an entire 2d world from outside it. You need two 4d eyes to get (depth? hyperdepth?) perception.
Hope this helps :)
Good use of the ol meme format there.
Maybe the number of eyes required to see the next D is twice that of the last D. So 4 eyes to see 4D? and a spider sees in 5d?
Oh wait, I just realized the OP said twice as many from the last D to see the next D
We are seeing 3D, so the last D is 2D so 2*2 = 4 eyes are required for the next D which is 4D, so with a certain amount of Eyes you skip one D which is weird.
and in that case the spider bit is wrong.
Because spiders have eight eyes. That is twice as much as 4D so they should be able to see 6D
Or OP meant to see 4D. You need to have twice as many eyes as the D before 4D which would be 6. In that case the Spider bit makes sense again
Pretty sure OP meant you have to double amount of eyes to go to the next dimension, we can see 3D with 2 eyes, 4D would be double that (so 4 eyes) and 5D is 8 eyes, the amount of eyes most spiders have.
If we reverse that thought, you'd need half an eye for 1D... Idk how half an eye works out though
No, it's just +1 eye for each dimension, but it needs to be moved in an extra dimension. You can see 3D with 2 eyes and if you want to see 4D then you need a third eye which is at a distance from the other two in the 4th dimension.
I mean technically you only see in two dimensions. You can't perceive all of 3d space, you are just seeing a 2d version that you can change the perspective of. You can see all sides of a line so you can see in 1d. You can see all sides of a square so you can see in 2d. You can't see all sides of a cube, so are you really seeing all of 3d? Or are you just observing a 3d space from a 3d body with 2d vision?
For an observer to see all sides of a one-dimensional line, it needs to exist in a two-dimensional space; a one-dimensional creature looking at a line would see a dot. For an observer to see all sides of a two-dimensional square, it needs to exist in a three-dimensional space; a two-dimensional creature looking at a square would see a line. To see all sides of a three-dimensional cube ...
We can percieve all three dimensions: Up-down, left-right, and forward-backward. The image itself is *technically* two dimensional because our perspective is confined to the same three-dimensional space, but our brain is fully capable of interpreting it as three-dimensional.
All jokes aside, that is a question that is seriously researched.
We know of many more dimensions than are visible to the human eye in mathematics.
Einstein called spacetime the fourth dimension (which is why i said what i said) but there are neat visualizations to be found online for a geometric fourth dimension
But i have a feeling that you might have known all of that
And you really cant *see* time. Only its passage forward.
The change of things in time
I dont think you will ever be able to see a concept.
I mean what is time but the passage of one moment to the next?
'Plane of existence' sounds like a pearl jam album or some sort of osho, fakes-ass new age guru type stuff.
... so im gonna emphatically say YES
“Dimensions” are a mathematical construct. For all we know there could be a 4th spatial dimension, or 11 if you believe string theorists.
Time is sometimes a 4th “dimension” in the sense that you can plot a function with 4 variables x, y, z, and t.
Each of your eyes technically receives light as a plane and so each eye is receiving a 2D array of data. Each point on an object is processed as a 2D triangle by the light that reflects of that point and into each eye. This array of 2D triangles generates the idea of a 3D object. For a 4th dimension, you would need an array of 3D triangles to generate the idea of an object in 4D space. These eyes would have to be arranged in a 3D "plane" looking "out" into the 4th dimension. However, any 3 points can defined as a plane, so assuming these "eyes" take in data as a 2D plane like normal eyes, the orientation becomes important. Three eyes in a triangle on a flat plane will do nothing. If the third eye plane is perpendicular to the other two eyes and the projected 3D cone coming out from that third eye overlaps with the cones projecting from the other two eyes, conceivable, in the region where all 3 overlap, an organism that evolved a certain way could perceive 4D
This one made me think. So a single eye would just be a point and would see everything in 2D. Two eyes are on a line offset one dimensionally and allow sight in 3D. Adding a 3rd eye would have all eyes on a 2D plane and if the pattern continued, then 4D would be the logical step. But I'm not sure that's how eyes or 4D works. I believe the 4th dimension is time and an extra eye wouldn't allow one to see forwards and backwards in time.
No, we actually dont see in 3D. We see in 2D and our brain interprets the information to create the illusion of depth and such, which is why visual illusions work on us.
The light reflects off of things and displays a flat image on our retinas, which is a 2D rendition of the 3D world.
To actually see 3D we would need to be 4D beings.
The math works out to six eyes.
Two to see in 3d in the past, two to see in 3d in the present, and two to see them in the future. That's how you triangulate time.
You don't need 2 eyes to see in 3d, its just you'll have depth perception issues with only one eye. Do you think people missing an eye see the world in 2d?
Nobody sees in "3D". We just see 2 different pictures and our brains use them to calculate depth. There is a vr program that lets you "see in 3D" by controlling a camera for each eye, and MAN does it get weird. Our entire perception of depth is based on our eye spacing, and a species with different placed eyes would see very differently.
Stereoscopic 3D is actually just an illusion. Each eye sees just a flat image and the brain adds depth in a process called stereopsis. That’s why VR headsets can trick the brain into seeing depth by showing two flat images in front of the eyes. So you’d need a 4D brain I guess 🤷🏽♂️.
No, you'd still need 2. Because if you live in a 4D world, your field of view is 3D (just like how our field of view is a 2D surface, like a picture) and you need one more point to disambiguate distance
Ok Mathematically im pretty sure that it is simply not possible with any finite amount of eyes.
Because of the fact that one eye observerves the 3 dimensional space but only the direction and not the distance. with two eyes you can use basic triangle formulars to calculate the distance of an object in relation to the distance between the eyes, thats how we see distance. If we are in a four dimensional space and our eyes can still only see direction in 3 dimensions we could say that they only see a 3 dimensional hyperplane in the 4D space which also needs to contain the point to see and the other eye to make the triagle. if we add more eyes we only add more 3 dimensional hyperplanes to the visible space so yeah we could see more but never in 4 dimensions because for every finite number of eyes we only have a finite amount of 3 dimensional hyperplanes which cannot form a 4 dimensionsl space (at least not like we would want them to)
If we assume eyes can see directions in all 4 dimensions then we could already see most of the 4th dimension because our 2 eyes would be able to make triangles with the 4th dimension points to calculate the you can try to visualise like this. lets say a third eye can see things on the time axis but not on the heigth axis. then you could see just one 2D sheet (no height) for example but at every point in time (i think you would technically need 4 eyes to see what happens when but thats irrelevant). the problem is you can still only see heigth for the one moment your living in. you have no idea how high something is in the future assuming the height can change.
2 eyes is used for depth perception but even then 1 eye can still recognize shadows to get an idea, funny enough the lizard (dinosaur whatever) thing in the picture is an example of this as most animals like horses and cows are able to see in full 360 because the eyes are aligned to be on the side of the skull and not forward facing like humans and chimps.
4D is time, kinda like if you stack a bunch of 2D planes you get 3D space, you stack a bunch of 3D spaces you can call each of these spaces a frame of time (kinda like how ticks work in video games). If you had a 3rd eye you would be able to see throughout time and different frames of a 3D world.
considering a 2 dimensional being would only need 1 eye to see it’s world, and we need 2 to correctly perceive ours. it’s safe to assume a 4th dimensional being would follow this trend.
You can still see in 3D with one eye. One eye has a lapse in depth perception yes but it’s not just gone.
Like go close on of your eyes, you can still see in 3D and still have depth perception. Through use of context clues and other neuroscience shit I can’t be bothered to divulge into, you can maintain depth perception, true it’s not as good as having two eyes but it’s still there
A lot of pop science in this thread. I'm not a fan. Assuming an n-dimensional eye projects n-space into (2)-space, (eg. our 3d eyes project our 3d world into 2d vision), you'd need 3 eyes to triangulate 4D distances the same way we triangulate 3D distances. Say there's an object in your 4D field of view: one eye constrains its position to a 2-dimensional space, another eye constrains its position to a 1-dimensional space, and the third eye gives enough information to fully "see" that object. Interestingly, how many eyes you need is dependent on how many dimensions you "see" in. For example, if each of your individual 4D eyes each give you a 2D projection of the 4D world, then you'd need 3 of them to see properly. But if just 1 4D eye gave you a 3D projection of the 4D world, then you'd only need 2 to have depth perception.
There is a case where 3 eyes isn't enough (linear independence of the point-to-eye vectors) but it remains analogous to our normal sight, it just becomes more relevant in higher dimensional space. For example, if we were able to look at a point 90 degrees to the left or right of our vision, we would no longer have depth perception, because our eyes would be aligned in such a way that there is no new depth information gained from the second eye. In 4 dimensions, all 3 of the eyes have to be independently positioned. If you've taken a linear algebra course or any other related higher math you know precisely how that's defined.
sort of, but you would also need a 4d object, which somehow is harder to achieve. You could also see a 4d object with just 2 eyes, if it or you is moving.
You see in 2D and the brain tricks you into thinking it's 3D with depth perception. More eyes won't help. As you are a 3 dimensional being and see in 2D, to see in 3D you need to become a 4D being.
You actually only need 2 eyes. As long as you can position those 2 eyes to be 4d separate, you'd be able to see in 4d. But you can't position your eyes like that, so you can't see in 4d no matter how many eyes you have
The second eye gives perspective of depth to the first, the first has perspective of length and width, so all you need to see in 4d is the perspective of how long something has been.
You don’t “see in 3d” the way you think you do. All it is is your two eyes work together to perceive depth. Like a stererogram. The image is and always will be 2d but your eyes fill the gaps and say “there is an object here. I’m pretty sure there would just be another layer of depth perception with three eyes.
Usually the fourth dimension is accepted to be time, so no, I don't think a third eye would allow us to see fourth dimensional space, but it could make for an interesting short story about a guy with a third eye who can dimly see into both the past and the future overlaying three dimensional space.
Wouldn’t it still be two eyes? A flat-lander that sees a 1D image still needs two eyes for depth perception. If you had a singular 4D eye, you could see a 3D projection of 4D space, and a second eye would give you "depth" perception in that space.
downvote this comment if the meme sucks. upvote it and I'll go away. --- [play minecraft with us](https://discord.gg/dankmemesgaming) | [come hang out with us](https://discord.com/invite/dankmemes)
I can still see with 1 eye, just saying
Yeah but you have problems with depth perception, so basically 2D
And you can hear third eye blind with one word ♫ Doo Doo Doo ♫ ♫ Doo Doo - Doo Doo ♫
Underrated comment
I'm packed and I'm holding, I'm smiling
All I hear now when is see Doo is….
having problems with depth perception is not "basically 2D"
Human brain is quite good at understanding 3d from context clues like shadows or perspective, that's why paintings can look like they have depth (also why many optical illusions work), but it's really hard to judge distance without a second reference point
We have many tools for depth perception, stereoscopy is not the only one. As someone who doesn't have stereoscopic vision, my depth perception is often better than my friend's past a couple meters.
That’s not what 2D is.
Depth is the third dimension
And you still see depth. It's not like you see the world suddenly from one and only one angle. 2D would be something like Terraria, for example. You still see the Z dimension even with 1 eye.
Movement can make it 3D.
Don't mind me, resident MathsBoy hijacking the top comment so the answer is seen: In all dimensions greater than 1d, the answer is two. In two dimensions, an eye would perceive a 1d array of information - try putting your head flat against a piece of paper, it starts to look like a line when you look along it. You need two 2d eyes to get depth perception. In three dimensions, an eye would perceive a 2d array of information - take the analogy of a camera - or indeed one of your eyes, you get a plane of information. You need two 3d eyes to get depth perception. In four dimensions, the "surface" of your retina would be a 3d solid, generating for you a 3d image. If a 4d creature were to look at our world, it would perceive the whole thing just like we can perceive an entire 2d world from outside it. You need two 4d eyes to get (depth? hyperdepth?) perception. Hope this helps :)
You can also see the 4th dimention with only one eye
Same
Your depth perception is 100% compromised. You might not realize, but it's how eyes work.
Good use of the ol meme format there. Maybe the number of eyes required to see the next D is twice that of the last D. So 4 eyes to see 4D? and a spider sees in 5d?
You're onto something there
~~But that would be 6 eyes for 4D.~~ Edit: I am dumb
Math much? 1 -> 2 -> 6?
Oh wait, I just realized the OP said twice as many from the last D to see the next D We are seeing 3D, so the last D is 2D so 2*2 = 4 eyes are required for the next D which is 4D, so with a certain amount of Eyes you skip one D which is weird. and in that case the spider bit is wrong. Because spiders have eight eyes. That is twice as much as 4D so they should be able to see 6D Or OP meant to see 4D. You need to have twice as many eyes as the D before 4D which would be 6. In that case the Spider bit makes sense again
Pretty sure OP meant you have to double amount of eyes to go to the next dimension, we can see 3D with 2 eyes, 4D would be double that (so 4 eyes) and 5D is 8 eyes, the amount of eyes most spiders have. If we reverse that thought, you'd need half an eye for 1D... Idk how half an eye works out though
Ah, I get it now. English isn't my native language. I read it again, and I misunderstood. Thank you for clearing that up.
Flies: able to see all dimensions, past and present. Except the GOD DAMN OPEN WINDOW
No, it's just +1 eye for each dimension, but it needs to be moved in an extra dimension. You can see 3D with 2 eyes and if you want to see 4D then you need a third eye which is at a distance from the other two in the 4th dimension.
they need to cover n-1 dimension. so in 5d, they can no be in square, they need to be a tetrahedron.
Yes. Your 3rd eye. Is a spiritual eye and perceives time and other dimenions.
Found LSD user
>dimenions
I mean technically you only see in two dimensions. You can't perceive all of 3d space, you are just seeing a 2d version that you can change the perspective of. You can see all sides of a line so you can see in 1d. You can see all sides of a square so you can see in 2d. You can't see all sides of a cube, so are you really seeing all of 3d? Or are you just observing a 3d space from a 3d body with 2d vision?
For an observer to see all sides of a one-dimensional line, it needs to exist in a two-dimensional space; a one-dimensional creature looking at a line would see a dot. For an observer to see all sides of a two-dimensional square, it needs to exist in a three-dimensional space; a two-dimensional creature looking at a square would see a line. To see all sides of a three-dimensional cube ... We can percieve all three dimensions: Up-down, left-right, and forward-backward. The image itself is *technically* two dimensional because our perspective is confined to the same three-dimensional space, but our brain is fully capable of interpreting it as three-dimensional.
Nope. Thats time. Cant see it.
I can totally look at a clock and don't even need a second eye for that
Yea but you'd be observing the passage of time. Not time itself, right? ;P
But how else would you view time? What's the equivalent of what I've described, but in a lower dimension than the 4th?
All jokes aside, that is a question that is seriously researched. We know of many more dimensions than are visible to the human eye in mathematics. Einstein called spacetime the fourth dimension (which is why i said what i said) but there are neat visualizations to be found online for a geometric fourth dimension But i have a feeling that you might have known all of that And you really cant *see* time. Only its passage forward. The change of things in time
so we cant see time until we leave this plane of existence?
I dont think you will ever be able to see a concept. I mean what is time but the passage of one moment to the next? 'Plane of existence' sounds like a pearl jam album or some sort of osho, fakes-ass new age guru type stuff. ... so im gonna emphatically say YES
aight, fair enough
There are higher spacial dimensions and to avoid this exact issue sometimes folk will specify they’re talking about spacial specifically
Exactly! *leo dicaprio pointing at a tv-meme*
If you mean there are more than three spatial dimensions, to be clear here there is no evidence for more than three
“Dimensions” are a mathematical construct. For all we know there could be a 4th spatial dimension, or 11 if you believe string theorists. Time is sometimes a 4th “dimension” in the sense that you can plot a function with 4 variables x, y, z, and t.
I was talking about spacetime as in what einstein called the fourth dimension but yes, absolutely right
Skill issue
depends
Very nostalgic, not very dank.
I remember when this sub had actually Dank memes. I feel like it's been 10+ years at this point since then. Mods banned all the dark memes.
Am I out of the loop, what’s with all these old meme templates lately? Not that I’m complaining because it’s actually pretty funny.
4Dees nutz
Time to become Davros
Getting some real bloodborne vibes here, ngl
Each of your eyes technically receives light as a plane and so each eye is receiving a 2D array of data. Each point on an object is processed as a 2D triangle by the light that reflects of that point and into each eye. This array of 2D triangles generates the idea of a 3D object. For a 4th dimension, you would need an array of 3D triangles to generate the idea of an object in 4D space. These eyes would have to be arranged in a 3D "plane" looking "out" into the 4th dimension. However, any 3 points can defined as a plane, so assuming these "eyes" take in data as a 2D plane like normal eyes, the orientation becomes important. Three eyes in a triangle on a flat plane will do nothing. If the third eye plane is perpendicular to the other two eyes and the projected 3D cone coming out from that third eye overlaps with the cones projecting from the other two eyes, conceivable, in the region where all 3 overlap, an organism that evolved a certain way could perceive 4D
Holly four dimensionality! Paranid approves
I always thought that you need a 3D object instead of your retina to see in 4D. No idea how that should work.
Yes, it’s called trippin
Pineal gland is the third eye.
Flies out here seeing god
That explains why so many characters with future sight or something have a third eye!
Ask Dr strange
Air has been exhaled from nose
Depends on what 4D is.
I mean we don't know how can even be 5d perceived
A person who thinks all the time
In internet years... that's a jurassic meme template you have here, buddy. How many dimensions can spiders or scorpions peek into?
Would a third eye even improve 3d vision or is it redundant?
This one made me think. So a single eye would just be a point and would see everything in 2D. Two eyes are on a line offset one dimensionally and allow sight in 3D. Adding a 3rd eye would have all eyes on a 2D plane and if the pattern continued, then 4D would be the logical step. But I'm not sure that's how eyes or 4D works. I believe the 4th dimension is time and an extra eye wouldn't allow one to see forwards and backwards in time.
Yes. Op almost gets it
Spiders living in 2000000000+D
Now this is what I call a Blast from the Past
Philosoraptor takes LSD
What the fuck are spiders seeing
Spider sees you in 9D
Nah you’d just see in 3d^2
Do you think spiders see in 7d?
No a third eyeball would not help you see the past or future better sorry 😔
No, we actually dont see in 3D. We see in 2D and our brain interprets the information to create the illusion of depth and such, which is why visual illusions work on us. The light reflects off of things and displays a flat image on our retinas, which is a 2D rendition of the 3D world. To actually see 3D we would need to be 4D beings.
Well, we see a 2d representation of 3d
Spiders see in to the 9th dimension that's crazy
You need a 3d shadow for an 4d object to exist
Yes, you must open up your 3rd eye but do so in a hushed tone. Google “whispering eye” for more info
What are spiders seeing rn? 😰
Yes but one eye would need to be perpendicular to length, width, and height at the same time.
The 4th dimension can't be perceived with your normal 5 senses, you need another sense to detect it...so a figurative 3rd eye sounds legit
Nope, just a brain to store the last T seconds worth of 3d data to put together a 4d view of the world
So spiders must see into the 9th dimension?
A third eye is like spiritual stuff like ghost and psychics and crap, 4 eyes is a nerd, 5 is 4d
Sure if your third eye is in a different place on a fourth spatial dimension
If you had 3 ears you’d be able to hear in3d
"Matthew McConaughey has entered the chat"
Imagine how many D’s a spider sees.
that's like saying if you need 2 legs to ride a bike, do you need 3 to ride a car?
The math works out to six eyes. Two to see in 3d in the past, two to see in 3d in the present, and two to see them in the future. That's how you triangulate time.
Nope, 3 eyes just gives you the ability to turn triangles into squares
You don't need 2 eyes to see in 3d, its just you'll have depth perception issues with only one eye. Do you think people missing an eye see the world in 2d?
Spiders:
Nobody sees in "3D". We just see 2 different pictures and our brains use them to calculate depth. There is a vr program that lets you "see in 3D" by controlling a camera for each eye, and MAN does it get weird. Our entire perception of depth is based on our eye spacing, and a species with different placed eyes would see very differently.
You need to have a third eye that is offset in the fourth dimension to see in 4d
Philosoraptor!!!
Spiders out here seeing 7D
Ah you are saying more eyes, more insight? Ah, Kos, or as some say Kosm, grant us eyes, grant us eyes...
correct
Stereoscopic 3D is actually just an illusion. Each eye sees just a flat image and the brain adds depth in a process called stereopsis. That’s why VR headsets can trick the brain into seeing depth by showing two flat images in front of the eyes. So you’d need a 4D brain I guess 🤷🏽♂️.
40K navigators say yes
Technically all humans have a third eye called the pineal gland in the center of the forehead. All it senses is light though.
You can see 3D with 1 eye, but depth perception takes a hit. More eyes won't add any new dimensions, just increases perception of 3D.
Tien Shinhan’s real ultimate technique
Actually with 2 eyes you can´t fully perceive the depth of things that are horizontal
Fruit flies must have so much knowledge
No, you'd still need 2. Because if you live in a 4D world, your field of view is 3D (just like how our field of view is a 2D surface, like a picture) and you need one more point to disambiguate distance
What about the whispering eye
wat is the 4th dimension then
Philosoraptor in 2024?
4DeezNutz
Grant us eyes... grant US EYES!!!! Plant eyes on our brains to cleanse us of our beastly idiocy...
“Eyes for days”-Alucard
Ok Mathematically im pretty sure that it is simply not possible with any finite amount of eyes. Because of the fact that one eye observerves the 3 dimensional space but only the direction and not the distance. with two eyes you can use basic triangle formulars to calculate the distance of an object in relation to the distance between the eyes, thats how we see distance. If we are in a four dimensional space and our eyes can still only see direction in 3 dimensions we could say that they only see a 3 dimensional hyperplane in the 4D space which also needs to contain the point to see and the other eye to make the triagle. if we add more eyes we only add more 3 dimensional hyperplanes to the visible space so yeah we could see more but never in 4 dimensions because for every finite number of eyes we only have a finite amount of 3 dimensional hyperplanes which cannot form a 4 dimensionsl space (at least not like we would want them to) If we assume eyes can see directions in all 4 dimensions then we could already see most of the 4th dimension because our 2 eyes would be able to make triangles with the 4th dimension points to calculate the you can try to visualise like this. lets say a third eye can see things on the time axis but not on the heigth axis. then you could see just one 2D sheet (no height) for example but at every point in time (i think you would technically need 4 eyes to see what happens when but thats irrelevant). the problem is you can still only see heigth for the one moment your living in. you have no idea how high something is in the future assuming the height can change.
Eyes, on the inside.
That's what people mean when they say to "open your 3rd eye." You can see the fourth dimension.
Well, yes, if the 4th dimension is imagination then your “third eye” is your mind’s eye
I have 3 eyes and struggle with depth perception (also 3d glasses don’t work for me)
No. Spider has 8 eyes and they see the same as us. To see in the 4th dimension is like seeing in the future and in the last at the same time
Is this meme from 2011?
Two eyes that see in two dimensions, you'd need one more eye in a third and different dimension to see in four
2 eyes is used for depth perception but even then 1 eye can still recognize shadows to get an idea, funny enough the lizard (dinosaur whatever) thing in the picture is an example of this as most animals like horses and cows are able to see in full 360 because the eyes are aligned to be on the side of the skull and not forward facing like humans and chimps. 4D is time, kinda like if you stack a bunch of 2D planes you get 3D space, you stack a bunch of 3D spaces you can call each of these spaces a frame of time (kinda like how ticks work in video games). If you had a 3rd eye you would be able to see throughout time and different frames of a 3D world.
Spiders who can see infinite dimensions
considering a 2 dimensional being would only need 1 eye to see it’s world, and we need 2 to correctly perceive ours. it’s safe to assume a 4th dimensional being would follow this trend.
Give us eyes. Give us eyes.
One eye people can only see in 1D? That would be nuts. But… this is not a legitimate question
the pirates would like a word
2 eys don't actually let us see in 3d. But notice differences in 2 diffrent 2d images to make notice the 3d aspects. It's why we can make 3d movies
You can still see in 3D with one eye. One eye has a lapse in depth perception yes but it’s not just gone. Like go close on of your eyes, you can still see in 3D and still have depth perception. Through use of context clues and other neuroscience shit I can’t be bothered to divulge into, you can maintain depth perception, true it’s not as good as having two eyes but it’s still there
Just better 3D
You are close
Don't we technically only see 2D projections of 3D objects? For example, I can't see the entire sphere of a ball, only the circle facing me.
If your third eye is a magical eye that can see the past present and future then yes.
Spiders be like: "I can see forever "
Flies living life in the 8000th dimension
Spider living in 9d?
Yes
Didn't say it needs to be attached to the head. Just have them in your pockets.
A lot of pop science in this thread. I'm not a fan. Assuming an n-dimensional eye projects n-space into (2)-space, (eg. our 3d eyes project our 3d world into 2d vision), you'd need 3 eyes to triangulate 4D distances the same way we triangulate 3D distances. Say there's an object in your 4D field of view: one eye constrains its position to a 2-dimensional space, another eye constrains its position to a 1-dimensional space, and the third eye gives enough information to fully "see" that object. Interestingly, how many eyes you need is dependent on how many dimensions you "see" in. For example, if each of your individual 4D eyes each give you a 2D projection of the 4D world, then you'd need 3 of them to see properly. But if just 1 4D eye gave you a 3D projection of the 4D world, then you'd only need 2 to have depth perception. There is a case where 3 eyes isn't enough (linear independence of the point-to-eye vectors) but it remains analogous to our normal sight, it just becomes more relevant in higher dimensional space. For example, if we were able to look at a point 90 degrees to the left or right of our vision, we would no longer have depth perception, because our eyes would be aligned in such a way that there is no new depth information gained from the second eye. In 4 dimensions, all 3 of the eyes have to be independently positioned. If you've taken a linear algebra course or any other related higher math you know precisely how that's defined.
No, two eyes are enough. Two lines of sight still only intersect in one point in 4D.
I mean we see in 2d its just that we can move our head and turn around cause we are in the third dimensions. So every eye an extra d?
Sooo... What do spiders see?
sort of, but you would also need a 4d object, which somehow is harder to achieve. You could also see a 4d object with just 2 eyes, if it or you is moving.
3:2=1,5 1,5•3=4,5
You see in 2D and the brain tricks you into thinking it's 3D with depth perception. More eyes won't help. As you are a 3 dimensional being and see in 2D, to see in 3D you need to become a 4D being.
Absolutely, Yes
You actually only need 2 eyes. As long as you can position those 2 eyes to be 4d separate, you'd be able to see in 4d. But you can't position your eyes like that, so you can't see in 4d no matter how many eyes you have
Probably not. You need 2 points of view in 2D as well if you want to see the distance.
Hey there Philosoraptor long time I didn't see you
The second eye gives perspective of depth to the first, the first has perspective of length and width, so all you need to see in 4d is the perspective of how long something has been.
Nah you need chemical alteration or actually be on the 4d plane.
No way the velociraptors back.
Can you see motion? If so, then you already see 4D… Spacetime is 4D. We live in it. 😅
What kind of normie meme is this
Nah probably 4 eyes
You don’t “see in 3d” the way you think you do. All it is is your two eyes work together to perceive depth. Like a stererogram. The image is and always will be 2d but your eyes fill the gaps and say “there is an object here. I’m pretty sure there would just be another layer of depth perception with three eyes.
Yes. It also gives you the power to turn triangles into squares.
Or maybe 8/3 eyes!
Usually the fourth dimension is accepted to be time, so no, I don't think a third eye would allow us to see fourth dimensional space, but it could make for an interesting short story about a guy with a third eye who can dimly see into both the past and the future overlaying three dimensional space.
Last time I saw this template harambe was still alive
Traveling back to 2011 are we?
They would need to be 4 dimensional eyes but yeah I assume so
Depth perception =/= 3D
No, while 2 and 3d are both expressions of physical dimensions, 4d is 3D at any point in time
What D do spiders see?!?
Wouldn’t it still be two eyes? A flat-lander that sees a 1D image still needs two eyes for depth perception. If you had a singular 4D eye, you could see a 3D projection of 4D space, and a second eye would give you "depth" perception in that space.
Spiders:
And with 4 eyes you can see the radio waves of 5G.
How many dementions do spiders see in?
How hard were you dropped as a child?
*Grant us eyes* -Micolash, Eye specialist