Optical Illusions and understanding vision!
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2. Comment rated too low. Show this comment irishgek 2 years ago
It took me a few goes to get what he was on about ...he ment same color on that first one but im sorry he explained it wrong as at first its like he is asking same position color never came in to my head as i knew straight away there both the same just the background changing our perception
And the green red dot test ...try playing a game on nvidea card wi h th 3d opt on on after 10 mins playing with the red cyan glasses on if you stop take them off the world looks very very strange your eyes are totally confused
8:05 is so wierd take a screen shot cut the 2 squares out in paint and put them on black they are the same colour i doubted it so much and then i was like ...okay ...wierd
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that could have been me if I had physics teacher like him in high school... well, see you, my shift in Burger King is about to start
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"How we see is by constantly redefining normality"
......pretty much says it all about the entire Human Condition, doesn't it?
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10. Comment rated too low. Show this comment RodrigoSoza 2 years ago
This guy was fighting before the presentation... must put some better clothes for such a important presentation... respect !
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11. chickychick33- 2 years ago
I love this stuff. Very interesting. Take the time to watch it. Remember, knowledge is power. 
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Some interesting facts:
-Color blind (see black and white) usually are predators, they dont need colors to hunt. Many animals(including us) see in colors (blue, red, green) and we need this skill to find plants, fruits. But the most interesting are the birds, unlike us, they can see ultraviolet too. When they look at each other they fethers are even more beatiful.
-the eyes are always moving, even if you stare at one dot. Thats why you see rotating circles in some illsuions. If the eyes would not move, we simply would be blind, the brain is ignoring constant signals and notices only changes. Your brains now is ignoring temparature, pressure from the chair you sit, pressure from the clothes you wear.
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13. trancetunes (admin) 2 years ago
Quite an eye-opening talk! 
Seriously, though, one question for anyone who might know.. When I looked at the white dot between the green and red squares, and then back to the desert, the red tint was on the LEFT instead of the right (and the green was on the RIGHT instead of the left). What does that mean??
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14. Comment rated too low. Show this comment kaleemyork 2 years ago
i don't have time for long video thanks for upload
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16. jezarocks91 2 years ago
#13 i'm pretty sure thats the correct illusion.. i had the same with the colour tints fliped. Unless it means we both have cancer?
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19. Sizzlik (admin) 2 years ago
#13 because both halfs of the brain work inependent and hate each other..they want to talk on their own and fool you on their mission
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20. LightAng3l 2 years ago
#13
It's because green is a lighter color than reed. The eyes adjust to the green/reed color as light/dark patterns. As in all situations when the eye looks at a light/dark scene it adjusts this way :
Light = less light intake (closed iris, interlaced eyelashes)
Dark = more light intake (dilated pupils, wide opened eyes)
So the eyes adjust to different scenes, and then confronted with an identical scene...let me explain.
When you look at the desert scene, the eyes still expect the light/dark pattern, but instead they get an identical image. It takes a little time for the eyes to adjust so in the meantime you see the left image in a darker tone because the eye was expecting a light tone so it's overloaded. On the other hand the right eye is overcompensating and needs time to adjust so it sees the image with a lighter tone.
Applying this dark-left and light-right pattern to the desert image the one on the left appears redish because the eye expected more light (because of the green), and the desert appears brighter on the right because the eye expected a darker image (because of the red)
When the eye stop over/under compensating the images appear the same.
That's why the desert appeared red where the green was, because it was darker... and darker orange = red.
(149 votes)
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1. Xeromyr 2 years ago
While the internet is my favorite place in the world -- TED is my favorite place in the internet.