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-Café 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

Related Illusions:


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Date: 19 Feb 2009 | Author: mesmerX | Category: Pictures | Views: 564924

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Comments: 153

RAJARAJA
VERY NICE AWESOME WEBSITE...........

Guest
You need a gestalt switch...

Guest
so so dizzy but very amuzing loltongue laughing

Guest
Cute...!!!tongue

hihihihi....laughing

Nice...!!!wink

Guest
Wooooooowwwwww.............laughing
what the? it really made me dizzy.......wink
But... I like it....tongue Me and my friends are very interested on these stuffs....tongue
but... well... some older people said its not good for the eyes...sad is it true?wassat

geenbeann
wowwim dizzyyyyyy thats best mode people!tongue laughing

amna!!!!!!!
ha lol vry clever love it!!!smile tongue laughing wink

omgomgomg
omg its so coolsmile smile smile smile smile smile smile i can print out lilac chaser because my paper is holagraphic

unee
Am I dreaming?

Guest
angry my brain hurtstongue my eyes r twisted lolwink

HGD
Thank's it's great!

Guest
bahahahaha they kinde of do suck...but im in school and have nothing really better to do so...thanks wink

siosha
That was incredibously... magnifescently...stupid
I LOVE CHEESE!
it was awsome i guess who ever has time to look at this has no life...smile

Guest
cool lol awsome :D

Srinu
smile good ..! i like it but watch this illusion something-amazing-blog.blogspot.com/2009/11/amazing-illusion-you-never-seen-before.h
tml this is different

Guest
wink wassat tongue laughing sad angry crying smile there wicked

freak-face
wow....freaky the people who made this must look freaky too.....like you

Guest
I can't realy see the shadow checkers illusionangry But everything else it epictongue

Guest
wassat You just can't look awaytongue

Guest
For those of you who are calling the lilac chaser illusion a fake... you are retarded. The illusion is a moving graphic, which cannot be printed out. That does not make it fake, it just means that the illusion is more complicated than the others shown.

Obviously common sense is not really that common.

Chris
#18 - Only the square marked with the B matches the A not all the grey squares. Just use Photoshop and the color picker and it will show you the exact colors

B - R,G,B, = 120,120,120
A - R,G,B, = 120,120,120

Square diagonal of B is 121,121,121 and the next grey one is 123,123,123 so they are all not the same just the B and A match

sam
wow thats so coolsmile

Coca colllla
waaaaaaaaaaaa the illusions make me cry...cause they r soooo bad

Tilli
o cool how did u do dat

tori
winkwy too kool man

sinhuse musube
wow that so good i wont to know more
they cleava i wont do them

???
THose things are wiredwassat[/i]

Zac
WOW!!!smile!!!

Mitchell
smileI FEEL SOOOOO HIGH AHHHHHHHHHHHHH

the lilac chaser has graphix, but if u stare at the cross for long enough it looks like the disk erases the whole CIRCLE and after erases them all to the last one regenerates them. thus it IS an optical illusion "Smart guy"

lord141218
damdar laughing

laura
wow me and ma famli are like omg:laughing:
«woop woop»

-
SmartGuy--

The illusion in Lilac Chaser is not the animation. You can't print it out. It's supposed to be animated. The illusion comes from the appearance of the green dot and the subsequent disappearance of the purple dots.

crazy luv
OMG... that hurt my eyes & brain now i have a headache

AAA
THEY HURT LIKE CRAZY
angry

aaaa
OME.........smile

Kat
yo, tht was sum tripy asss sht..my brain hurtz

Bluey55
man im dizzy.. I just dont get how they make these wassat

binky
im about to puke! but the lilac chaser is very cool!wassat

person
wink my eyes are confused

nessa
wow i feel dizzy right nowtongue

Eagan Chan
It does not suckrocks!

Makes me dizzycrying

laughing

SmartGuy
If you print out the Lilac CHaser, it no longer works, and thus shows that it was NOT an optical illusion, but just the computer's graphix.All of the rest work though. Just remember, Lilac Chaser is FAKE! I am angry at the person who made tis for polluting the awesome optical illusions w/ fake ones! GEEZ! angryangryangry

Lizzie
These things are cool. But my sister tells me i'll go blind, I look at them so muchlaughing

Jessica Ojeda
Lilac Chaser (13) and Motion Illusion (14) my favorites for sure!

meeee
oh my goodness.
i love this sooo muchsmilesmilesmile

Joel Brown
I have seen many of these before, but everytime i see them they still give me a bit of enjoyment, especially the chaser one.

sakajowia
my head hurtsangry

Mous
very nice

blaise
nicesmile

Ben
tehewink

dazed
I am so dizzy. wassat

Ankur_Patel
Very Nice wink

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