An optical illusion is always characterized by visually perceived images that, at least in common sense terms, are deceptive or misleading.

Therefore, the information gathered by the eye is processed by the brain to give, on the face of it, a percept that does not tally with a physical measurement of the stimulus source.

This is a list of twenty amazing illusions.

 

1. Blivet

Pic Blivet

A blivet, also known as a poiuyt, is an undecipherable figure, an optical illusion and an impossible object. It appears to have three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at the other end.

2. Bezold Effect

Bezold Effect

The Bezold Effect is an optical illusion, named after a German professor of meteorology, Wilhelm von Bezold (1837-1907), who discovered that a color may appear different depending on its relation to adjacent colors. In the above example, the red seems lighter combined with the white, and darker combined with the black.

 

3. Café Wall Illusion

800Px-Cafe? Wall.Svg

The café wall illusion is an optical illusion, first described by Doctor Richard Gregory. He observed this curious effect in the tiles of the wall of a café at the bottom of St Michael’s Hill, Bristol. This optical illusion makes the parallel straight horizontal lines appear to be bent. To construct the illusion, alternating light and dark “bricks” are laid in staggered rows. It is essential for the illusion that each “brick” is surrounded by a layer of “mortar” (the grey in the image). This should ideally be of a color in between the dark and light color of the “bricks”.

 

4. The Chubb Illusion

Chubbillusion

The Chubb illusion is an optical illusion wherein the apparent contrast of an object varies dramatically, depending on the context of the presentation. Low-contrast texture surrounded by a uniform field appears to have higher contrast than when it is surrounded by high-contrast texture. This was observed and documented by Chubb and colleagues in 1989.

 

5. Ebbinghaus Illusion

650Px-Mond-Vergleich.Svg

The Ebbinghaus illusion is an optical illusion of relative size perception. In the best-known version of the illusion, two circles of identical size are placed near to each other and one is surrounded by large circles while the other is surrounded by small circles; the first central circle then appears smaller than the second central circle.

 

6. Fraser Spiral Illusion

597Px-Fraser Spiral.Svg

The illusion is also known as the false spiral, or by its original name, the twisted cord illusion. The overlapping black arc segments appear to form a spiral; however, the arcs are a series of concentric circles.

 

7. Hermann Grid Illusion

232Px-Hermann Grid Illusion.Svg

The Hermann grid illusion is an optical illusion reported by Ludimar Hermann in 1870 while, incidentally, reading John Tyndall’s Sound. The illusion is characterised by “ghostlike” grey blobs perceived at the intersections of a white (or light-colored) grid on a black background. The grey blobs disappear when looking directly at an intersection.

 

8. Hering Illusion

320Px-Hering Illusion.Svg

The Hering illusion is an optical illusion discovered by the German physiologist Ewald Hering in 1861. The two vertical lines are both straight, but they look as if they were bowed outwards. The distortion is produced by the lined pattern on the background, that simulates a perspective design, and creates a false impression of depth.

 

9. Impossible Cube Illusion

582Px-Impossible Cube Illusion Angle.Svg

The impossible cube or irrational cube is an impossible object that draws upon the ambiguity present in a Necker cube illustration. An impossible cube is usually rendered as a Necker cube in which the edges are apparently solid beams. This apparent solidity gives the impossible cube greater visual ambiguity than the Necker cube, which is less likely to be perceived as an impossible object. The illusion plays on the human eye’s interpretation of two-dimensional pictures as three-dimensional objects.

 

10. Isometric Illusion

Simpleisomillusion

An isometric illusion (also called an ambiguous figure or inside/outside illusion) is a type of optical illusion, specifically one due to multistable perception. In the image above, the shape can be perceived as either an inside or an outside corner.

333Px-Jastrow Illusion.Svg

The Jastrow illusion is an optical illusion discovered by the American psychologist Joseph Jastrow in 1889. In this illustration, the two figures are identical, although the lower one appears to be larger.

 

12. Kanizsa Triangle

300Px-Kanizsa Triangle.Svg

The Kanizsa triangle is an optical illusion first described by the Italian psychologist Gaetano Kanizsa in 1955. In the image above, a white equilateral triangle is perceived, but in fact none is drawn.

 

13. Lilac Chaser

400Px-Lilac-Chaser

Lilac chaser is a visual illusion, also known as the Pac-Man illusion. It consists of 12 lilac (or pink or magenta-like), blurred disks arranged in a circle (like the numbers on a clock), around a small, black, central cross on a grey background. One of the disks disappears briefly (for about 0.1 second), then the next (about 0.125 second later), and the next, and so on, in a clockwise direction. When one stares at the cross for about 20 seconds or so, one first sees a gap running around the circle of lilac disks, then a green disk running around the circle of lilac disks, then a green disk running around on the grey background, the lilac disks appearing to have disappeared or to have been erased by the green disk.

 

14. Motion Illusion

800Px-Anomalous Motion Illusion1

One type of motion illusion is a type of optical illusion in which a static image appears to be moving due to the cognitive effects of interacting color contrasts and shape position. To properly view this effect, click the image above to see the full sized version.

 

15. Necker Cube

400Px-Necker Cube.Svg

The Necker cube is an ambiguous line drawing. It is a wire-frame drawing of a cube in isometric perspective, which means that parallel edges of the cube are drawn as parallel lines in the picture. When two lines cross, the picture does not show which is in front and which is behind. This makes the picture ambiguous; it can be interpreted two different ways. When a person stares at the picture, it will often seem to flip back and forth between the two valid interpretations (so-called multistable perception).

 

16. Orbison Illusion

225Px-Orbison Illusion.Svg

The Orbison illusion is an optical illusion that was first described by the psychologist William Orbison in 1939. The bounding rectangle and inner square both appear distorted in the presence of the radiating lines. The background gives us the impression there is some sort of perspective. As a result, our brain sees the shape distorted. This is a variant of the Hering and Wundt illusions.

 

17. Poggendorff Illusion

302Px-Poggendorff Illusion.Svg

The Poggendorff Illusion is an optical illusion that involves the brain’s perception of the interaction between diagonal lines and horizontal and vertical edges. It is named after Johann Poggendorff (1796-1877), a German physicist who first described it in 1860. In the image above, a straight black and red line is obscured by a grey rectangle. The blue line appears, instead of the red line, to be the same as the black one, which is clearly shown not to be the case in the second picture.

 

18. Adelson’s Checker Shadow Illusion

Same Color Illusion

The image shows what appears to be a black and white checker-board with a green cylinder resting on it that casts a shadow diagonally across the middle of the board. The black and white squares are actually different shades of gray. The image has been constructed so that “white” squares in the shadow, one of which is labeled “B,” are actually the exact same gray value as “black” squares outside the shadow, one of which is labeled “A.” The two squares A and B appear very different as a result of the illusion.

 

19. White Illusion

White Illusion

White’s illusion is an optical illusion illustrating the fact that the same target luminance can elicit different perceptions of brightness in different contexts. Note, that although the gray rectangles are all of equal luminance, the ones seen in the context with the dark stripes appear brighter than the ones seen in the context with the bright stripes. Note that this effect is opposite to what would be expected from a simple physiological explanation on the basis of simultaneous contrast (in that case the rectangles sharing the long borders with the dark stripes should appear brighter).

 

20. Zöllner Illusion

480Px-Zollner Illusion.Svg

In this figure the black lines seem to be unparallel, but in reality they are parallel. The shorter lines are on an angle to the longer lines. This angle helps to create the impression that one end of the longer lines is nearer to us than the other end. This is very similar to the way the Wundt illusion appears. It may be that the Zöllner illusion is caused by this impression of depth.

Source: Wikipedia

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Date: 19 Feb 2009 | Author: mesmerX | Category: Pictures | Views: 566827


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Comments: 153

llama corn
……. wassat


Guest
angry


Edank
read this.once u ongoing there is no turni back. a small 10 year anneict girl was raped and murdured in 1945. her body was not found untill 1947.then a boy last? week read this and did not copy and paste this thought. the dead girl appeared in his room memorable him and killed him. if ou do not copy? and paste this onto 10 videos in 30 minutes the dead girl will appear in your room tonight and? assembly house you and kill you. well you better start to copy and paste if you want to? be safeVA :F [1.9.13_1145]please wait…VA: F [1.9.13_1145](from votes)


Guest
laughing wassat wink


Rebecca
Maybe word it a little simpler??


Guest
wow!!! i can’t stop looking at the motion illusion, i think my brain is gonna explode… laughing


kimmybooemobuzz
Bah..! i don’t speack ingish my inglish is small


Guest
cool!!!!!!!!! laughing


Guest
makes me wanna jizz in my pant, eww sticky


Guest
laughing crying


Guest
smile wink wassat tongue laughing sad angry crying nice


Guest
Holy shit, some of the spelling and grammar in the comments…Good job, guys.
On a slightly more relevant note, these optical illusions do my head in ;p Number 18 always boggles my poor mind.


karthika
those are cool and awesome………… tongue wassat


ela
i feel headache crying just b’coz of that optical illution


Guest
tongue laughing wink sad angry crying


rosso twins
smile wink wassat tongue laughing
this is ace.guess what me and milly have bought our own pack
amazing optical illusions
yeah yeah……………………….


Guest
cooleo


Guest
cool that was wack laughing wassat wink smile crying wackn by julian


Guest
Just looked at this page hungover… blurrghh sad


Guest
so cool <3 laughing wink smile almost makes me wanna crying


Guest
Totally awesome makes my eyes hurt tho. crying


SO COOL
this is so cool! its nice to see how a simple mixture of colors can trick our eyes so easily! thanks! laughing tongue

my eyes do hurt a little though… crying


james bellched
wow dude totaly radicle


momo
wait some of these are confusing angry i mean like what the heak


Guest
smile wow so cool


Deidara
I don’t believe number 18. I just don’t, it’s impossible


Guest
that was trippy and amazing 😀 loved it : D smile wink wassat tongue laughing sad angry crying


shreya
my eyes are in pain…after watching d illusion..


Guest
ahhhhhhmayyyyyyzinggg :)i loved it


kadri
tongue laughing


Guest
my favourite website


lana
so cool laughing


Guest
those are cool wink


Guest
Best web site I’ve been to in months 🙂


Guest
tongue ful fajn


Guest
tongue love em


Guest
crying angry sad crying angry crying sad crying sad crying


JIM
laughing crying crying crying crying crying


Guest
MY EYES HURT!!!!!!!!!!!!!!!! crying angry


Guest
nothing is happening.. angry

«»



Guest
none of you retards can spell. technology will be the death of written language. piece.


Guest
brandon moore is gay laughing


Guest
smile tongue
UNCERTAINTY!


Asmin
ohhh i m illustrated by the PICs man what have u done


sexyboy1
whoa there was one that is green in cicles but fuck you all and your moms tongue laughing


CASSIE
tongue i fell so crazelaughing tongue


alex
smile omg im so freacked out wassat


markjo
hahahahahahahahah………….. its so amazingggggggggggglaughing laughing smile smile


Guest
it is so kreepy wassat


Guest
it is so kreepy crying wassat wassat laughing


Guest
wassat ??????????


Guest
18 and 14 are really… strange wassat


Guest
flower


Guest
very interesting


Guest
wink smile laughing


Guest
i gotta go make a reservation wid my toiletcrying


Guest
laughingtongue wink


Guest
pidarasy=)


rhiannon
it make me dizzy and light headed crying


Guest
ok


Guest
CRAAZZZY tongue


miisty poO
omg i feel sicklaughing


javy27
that so cool!!smile smile


anonymous
this is so cool


Guest
laughing


Zeus
uuuuuhhhhh???!!!!
GREAT!!!


Guest
smile nice:)


carlo
very very nice wink


Guest
very very nicelaughing


Paige
They Dont Half Mess With Your Mind Lol laughing


dvr00000
Awesome….evr1 picture!wink


Guest
woow !smile wink laughing


Guest
tongue laughing smile how beatiful


🙂
WHAT THE FUCN !!!!! LOL laughing laughing laughing laughing laughing laughing wassat wink smile laughing


srinivas
laughing wooowwwwwww,,!


hiiiii
Brb gonna barf wink


Guest
wassat galing ahhhh wassat


Olympians
MOMMYcrying


Guest
Gosh! I think i’ll throw up…!crying


Genesis
COOLlaughing tongue wink smile


Constantine25
Ayos ang galingsmile kaso nga lang nakakahilosad


Guest
thats crazy and i cant understand anythingangry


xxx
fakt hustýsmile laughing


Nomz
cookie monster owns all you faggots


Guest
hi

this is dumb


Guest
hi

this is dumb


Drexus
Motion Illusion makes me dizzy!crying

OMG this illusions are so incredible!!wink


Lelouch
I feel Dizzy right now!cryingtongue


Guest
Amazing!laughing smile


Guest
very interesting!!tongue


-reixo-
laughing it is very goooood illusion


u rok
ilove illutions but i threw up when i saw them. i dont think that good


william
smile i feel like i could throw up because im sooooooooooo dizzytongue wassat wink laughing sad angry crying the smileys r cool 2


Guest
karl was here 7th may 2010 9:47am in school bored …… suck my balls wink laughing wink


QQQQQueuesr
Kanizsa Triangle = 14 triangles. -.-


Guest
just awsomelaughing


Guest
yag yaga laughing


Guest
rly its gr8 🙂 🙂 🙂


Guest
angry thanks…. you got me glasses… man, i had to get glasses cause of the illusions… haha oh well, awesome!! tongue tongue tongue tongue tongue tongue tongue tongue wink wink wink smile laughing


Polisen
laughing hahah det bäste ja sett… bra förklarning ocksålaughing


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