that is so freeking trippy

that was really amazing!

Can't see anything but my nose, can't get anything but a headache.

Yeah, really nice. Very similiar to "Magic Eye".
But I would advise people wearing glasses to put them down.
It worked much better when I tried it

Have Fun

you dont actually cross your eyes, you just have to look at the picture and stare into space

Dont actually cross your eyes just try to stare into space beyond your monitor until you see the three chairs.

I SEE 4 CHAIRS LOL

how do you do it?

hella tight!!!!!kinda like in magic eye books!

Wow, this is one of the most amazing illusions on your site for sure!

I'm just like kevin - I saw four chairs!

No, I dont think this one is designed to work by staring into space. If you look carefully, you'll notice that the two pictures simulate what your left and right eye see, only the pictures are opposite each other. in other words what you would see from your right eye is in the pic on the left, and what you would see from your left eye is the pic on the right.
The only way that makes sense to me and that worked for me is to cross your eyes, cause that way you point your left eye to the right pic, and at the same time point your right eye to the left pic. The hard part though was after getting to see three chairs, I had to try to focus the image, which took a while.

you're right though... it gives me a headache :P

wow thats cool

coolAH!

if you know ho to cross one eye, that works too

this one i dont either... i need help

cool stuff dude, cool stuff....

great illusion, need more of that, man!

shut up salem

i can't hold the three images while watching the middle one. once i even think about the existence of the middle one, it dissapears

Ps first post

I agree with Salem, this is a cross-eyed stereogram, not a divergent (focussing behind the screen) one.

me no get it

i can't go cross eye'd my muscles in my eyes dun't work :'(

Salem - you are not right - it is a left pic on the left and right pic on the right (if you don;t beleive me - try turning your screen upside down and it still works) You can easily recreate this illusion on any digital camera. Just take a shot of specific point and move the camera 5 centimetres to the right and view the same exact point. the slight difference creates the 3d. try taking one of a person's face and post here. now that looks weird - great site - keep it up

Nice...took me a couple seconds, but I did manage to get it. AWESOME!

I can saw it only when I got pretty close to the image

i can c 3 chairs when i stare at the screen, but i agree with Blah_Blah: it just goes away when i try staring at it!!
it doesnt look 3D 2 me

Can't cross my eyer =[

I found out about this phenomonon serendipitously when I was young [probably 50 years ago]. I would stare at a tile wall [like in a toilet, but I could probably come up with a better example] and let my eyes slowly unfocus until the squares would float closer to one another. When the square I saw with my right eye covered the one I saw with my left [I know, or vice versa], I could then "focus" on the tile wall, and it would look normal. But when I moved my finger [or whatever] towards the wall, it looked for all the world like my finger was sinking into the wall. Very strange, and I couldn't get anyone else to get it, though I tried for a long time. Then they came out with those 3D pics that you had to look at forever to see, and I saw all of them in about a second. People couldn't believe I found them so quickly, but I had known the secret for a long time.

Actually, this would have worked better had the photographer moved the chair in the second photo so that the door frame could be seen from the same perspective in both [i.e. through the same part of the chair back]. You can see the 3D effect here, but you can also see 2 door mouldings.

wutt if u can't *sniff* CROSS YOU EYES?!
oh well cool anywayz
:3

"kevin

on 6:49 PM
I SEE 4 CHAIRS LOL"

you must have 3 eyes then!

sorry to say you are wrong salem and cosmic-coral.
loser, justin, me and rob are correct. you do not have to cross your eyes to see the 3D image. you just stare into space,beyond the screen, unfocus until the image appears. no eye-crossing here!

To clarify, your right eye must see the picture next to the words "visualize it" and your left eye must see the picture next to the words "tube of illusion." If the screen is right side up, you must converge to achieve this effect; if the screen is upside down you must diverge to achieve this effect (assuming, of course that your head is right side up the entire time). I'm just trying to synthesize the observations of Salem and "me" (post 24)

the third one just looks blurry to me!

I can't cross my eyes...and andy just confused me.

Basically, salem is right, and everyone who says to diverge your eyes is WRONG!!! You obviously have to cross your eyes to see it. It's so hard to diverge your eyes that it's almost not even possible. As long as your screen is right side up CROSS YOUR EYES to see it.

Sorry for confusing you Emily! Maybe if I were to state that converge=cross your eyes and diverge=look far away and that "the words "..." " refers to the the text above the stereogram.

lol im sitting on the same exact chair rite now!

haha.. Am I the only one that sees 4 chairs? goodness, im retarded.

first time it worked

This is a cross-eye not a diverge. (I can't do diverge, but I saw this one using cross-eye'd)

It helps to move your head away from screen, and tilt it left or right (to align the image)

This is really easy to make yourself, with a camera or 3D modeler. It's called a stereogram

Omg, that's awesome.
I found that it helped when I leaned in closer to the computer screen. Must have something to do with my far-sightedness. :)

holy cow that is freaking awesome!!!

CROSS!!!

AAAAAA!!
I don't know how to cross my eyes

when i look at it and see three chairs the third one isnt in 3d its just the same chair as the one on the left and right

nvm that post i wasnt looking at it right and i didnt read the instrcutions right

Um, I see 4 chairs.
After like half an hour, I managed to see 3 chairs, but then it disappeared.
And also, I don't get the point. I mean, the chair is 3D anyway right?
So I'm breaking my eyeballs trying to focus on the illusive 3rd chair just so I can see what was already there?

Wow, this is amazing. I figured out two tactics to make the 3d image appear. Other one is to line paper in middle of the two pictures, so that both of your eyes sees only the other picture, then you can actually see the picture been modified by your brain. The other way is to first look very close to the screen, so that your nose toches the center line of the picture. Then slowly move your head back and try to keep the picture as one. Thx, absolutely amazing illusion!