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Why do we see illusions at different times and from different locations in the room?

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How do optical illusions differ when the amount of light is changed?

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How do optical illusions differ when the amount of light is changed?

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Does it matter if you use one eye or two to view the illusion?

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Does it matter if you use one eye or two to view the illusion?

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Will the 'illusions' wear off if you do them all the time?

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Will the 'illusions' wear off if you do them all the time?

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How come I could only see the dude when I shook it back and forth?

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Does better/worse vision affect how we see optical illusions?

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Do all brains process signals of light the same?  

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Do all brains process signals of light the same?  

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Why does everyone's brain process optical illusions at mostly the same speed

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What difference does it make if you add lenses between your eyes and the image?

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Is there different affects on the illusion with people who have corrected vision (glasses and contacts)?

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Is there different affects on the illusion with people who have corrected vision (glasses and contacts)?

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How long does my brain hold an image?

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Why can I see it better without my eyeglasses?

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Why can I see it better without my eyeglasses?

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Does our mind filter out unexpected images?

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Is that Neal Patrick Harris in the Black and White Striped one?

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Is that Neal Patrick Harris in the Black and White Striped one?

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for the einstein in the back, does the back light create the illusion? What happens if you change the direction of the light?

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for the einstein in the back, does the back light create the illusion? What happens if you change the direction of the light?

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Does the angle make a difference when looking at the images?

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Does the angle make a difference when looking at the images?

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Does angle affect the way we see the picture

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Does angle affect the way we see the picture

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Does the light change as it moves through space to my eye

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Does the light change as it moves through space to my eye

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Why did the one with the red dot in the center hurt my eyes/head

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Why did the one with the red dot in the center hurt my eyes/head

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would these appear different, if you use a color filter to observe the image?

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would these appear different, if you use a color filter to observe the image?

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What causes near or farsidedness in people eyes. 

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What causes near or farsidedness in people eyes. 

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Why do some illusions trigger physiological responses like nausea and headaches?

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Why do some illusions trigger physiological responses like nausea and headaches?

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Why was it easier to see the illusions without my glasses?

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Why was it easier to see the illusions without my glasses?

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why did the "face" in the black and white vertical stripe illusion disappear when the lights were turned up? 

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why did the "face" in the black and white vertical stripe illusion disappear when the lights were turned up? 

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What happens if you wear polarized sunglasses to look at it?

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Was the Einstein illusion at the back of the room concave, and in a box of some sort?

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Was the Einstein illusion at the back of the room concave, and in a box of some sort?

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Does the amount of light in the room change the perspective

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Does the amount of light in the room change the perspective

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Why do different people see the illusions differently?

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Why do different people see the illusions differently?

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Why do the patterns continue to move (or seem to reverse) after the sequence has been stopped

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Why do the patterns continue to move (or seem to reverse) after the sequence has been stopped

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Why could I see the person very clearly if I closed my eyes tightly for a few seconds and then opened them 

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Why could I see the person very clearly if I closed my eyes tightly for a few seconds and then opened them 

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Would different colored lenses allow me to see something different?

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Would different colored lenses allow me to see something different?

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Does the illusion interpretation have a cultural or socio/economic basis that would need prior knowledge/experience?

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Does the illusion interpretation have a cultural or socio/economic basis that would need prior knowledge/experience?

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Is there people out there who could not see any of them

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Is there people out there who could not see any of them

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How does near/farsidedness effect the illusion? 

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How does near/farsidedness effect the illusion? 

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Why was I able to see Neil Patrick Harris when someone walked across the front of the room in front of the screen?

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Why was I able to see Neil Patrick Harris when someone walked across the front of the room in front of the screen?

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Why can some people see illusions and others cannot

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Why can some people see illusions and others cannot

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was it white on black...or black on white?

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was it white on black...or black on white?

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Most illusions are black, white and gray...what happens if they were in color

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Most illusions are black, white and gray...what happens if they were in color