Optical Illusions and understanding vision!
People who liked this video also liked
Comments
21 comments posted so far. Login to add a comment.
50 
Comment rated too low. Show this comment
2. irishgek commented 14 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
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
27 
40 
40
5. 13wallace13 commented 14 years ago
Don't skip just because its long. Its worth it
47 
31
7. cincodemayo commented 14 years ago
#5, I will take combo #(removed comment). super size it please.
35 
41 24
10. RodrigoSoza commented 14 years ago
This guy was fighting before the presentation... must put some better clothes for such a important presentation... respect !
9
11. chickychick33- commented 14 years ago
I love this stuff. Very interesting. Take the time to watch it. Remember, knowledge is power. 
51
12. archis commented 14 years ago
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.
-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.
48
13. trancetunes (moderator) commented 14 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??
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??
38
Comment rated too low. Show this comment
14. kaleemyork commented 14 years ago
i don't have time for long video thanks for upload
23
16. jezarocks91 commented 14 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?
23 
34 
64 
49
20. LightAng3l commented 14 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.
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.
39 More videos
keyboard_arrow_left newer older keyboard_arrow_right
About this video
Category: Documentary
Published: 14 years ago
Submitted by: SvyasMD
Views: 10,527
Rating:
(154 votes)
Length: 16:31 minutes
Filesize: 41.5 megabytes
Dimensions: 400 × 222 px
+38 1. Xeromyr commented 14 years ago