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Kendra Cherry

How Do Optical Illusions Work?

By , black-rose-bielefeld.de GuideJanuary 9, 2012

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optical illusions

What is an optical illusion? Optical illusions, more appropriately known as visual illusions, involves visual deception. Due to the arrangement of images, effect of colors, impact of light source or other variable, a wide range of misleading visual effects can be seen.

If you've ever struggled to see the hidden image in a single-image stereogram, you may have discovered that not everyone experience visual illusions in the same way. For some illusions, some people simply are not able to see the effect.

While optical illusions can be fun and interesting, they also reveal a great deal about the working of the brain. Learn more about some of the most famous optical illusion and discover exactly how and why these visual illusions occur in this optical illusion gallery.


February 18, 2012 at 12:27 pm
(1) olivia says:

my science fair project is on opties! hehehe

March 2, 2012 at 4:05 pm
(2) meghan says:

no way mine tooo?but how does your brain see illusions

March 4, 2012 at 8:21 pm
(3) Daniele says:

i did my project on optical illusions too.

March 10, 2012 at 8:49 pm
(4) Theresa says:

interesting subject that many people take for granted??.so nobody else would do it HAAAAAAAA

March 14, 2012 at 11:38 pm
(5) matt says:

my project is poop

March 28, 2012 at 9:40 am
(6) bob says:

hey there buddy

April 1, 2012 at 9:41 pm
(7) dede says:

omg no way mine too (science fair project)

April 4, 2012 at 3:27 pm
(8) pinto says:

ugh me too its so hard to find good research and facts! thank u this website :)

April 17, 2012 at 6:39 am
(9) gordon says:

so did i no way lol ;)

April 17, 2012 at 11:45 pm
(10) kendra says:


April 18, 2012 at 2:35 pm
(11) allyra greene says:

is it true
is it really

April 22, 2012 at 1:33 pm
(12) F raz says:

Lol. My science project is about optical illusions I?m doing quite good at it?

May 8, 2012 at 2:13 am
(13) Bob says:

This doesn?t answer my question, I ask how they work and it just tells me what they are :@ man people need to know what they are answering. man this is annying im finding it so hard to find the answer :(

May 8, 2012 at 12:36 pm
(14) Kendra says:


You have to actually click the link to the optical illusions gallery to learn how each illusion works: http://psychology.black-rose-bielefeld.de/od/sensationandperception/ig/Optical-Illusions/

May 14, 2012 at 2:45 am
(15) tony says:

my project is simply awsome

June 11, 2012 at 9:44 am
(16) brandon says:

my projects on this too

July 10, 2012 at 8:26 pm
(17) Dale says:

My science project is on this too xD

August 1, 2012 at 8:27 am
(18) Pixie says:

How do we actually create an eyewear that optical illusion will work?

September 7, 2012 at 9:12 pm
(19) obb says:

hey y does this work?

October 10, 2012 at 8:51 am
(20) kiki says:

this is very very helpful

October 27, 2012 at 4:25 am
(21) s0lomon brefo says:

please, i m do a thesis on visual illusion and spartial effects in textile design.can i get any related books to elaborate my understanding

November 22, 2012 at 1:41 pm
(22) lol says:

i did it for school as well!!

January 21, 2021 at 1:39 pm
(23) Olivia says:

I am doing my science fair project on optical illusions too!!!!

January 23, 2021 at 9:54 pm
(24) jojohn says:

science fair!!!!

January 25, 2021 at 8:58 pm
(25) coopster says:

my project on opties 2

February 6, 2021 at 11:55 am
(26) auto parts12354 says:

i wanted to know how they worked and none of this andswerd my questions! waist of my time

March 25, 2021 at 8:17 pm
(27) Daniel says:

yolo 4 lif

April 1, 2021 at 9:54 pm
(28) Ally ([email protected]) says:

I?m doing optical illusions for an expert project too! DO any of you know any experts I can contact by mail and their address? If so, email me! Its by my name and It?d really help. I need the email on the address by tonight so hurry! Lol. K thanks!

April 8, 2021 at 6:27 pm
(29) Stephanie says:

lol i?m doing optical illusions & stereograms for my science fair project:b

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