I was a pirate for halloween once, eye patch and all. I didn't have any problems gauging depth in a 3d world with only 1 eye.
That's because your brain also calculates distances based on perspective and memory. If you're 6' tall, then you know you're 6' tall, so when you look at the ground, you know it's 5' 9" (Or in your case, 5' 11" away, but still,) away and at what angle to level it is based on your sense of balance. Since your brain also knows how big the little pebbles in the asphalt or the blocks of the sidewalk or the blades of grass are, it can also estimate fairly accurately how far away an object sitting on the ground it. Since you know how big a doorway is, how tall your friends are, how big a television is, how far the distance from your front door to the street is, it continues to work even when you're not looking at the ground.
QUOTE (boit+)
Help me out. How comes when I watch movies with one eye closed I perceive images in 3 D. Is it only me or others have similar experience? Beats spending money on expensive tech. sets. Someone please explain.
Because your brain knows it's only perceiving the world in 2 dimensions, because you have one eye shut. Since it also knows that the world exists in 3 dimensions, it assumes that the movie you're watching is in three dimensions as well, and reacts accordingly to try to compensate for your lack of binocular vision by calculating depth as I mentioned above.
No matter what you do, you can't change the camera perspective, though, so the movie's still not 3D.
Meem
21st August 2009 - 08:23 PM
Holographic movies ... would be 3d? Maybe you could even say a dream too, but you get more than 3 sensations from dreams. You also get touch, taste/smell, feeling, pleasure, pain, and pretty confused.
Life is a dream! Oh I know too much, so don't take it too seriously.
buttershug
21st August 2009 - 09:19 PM
QUOTE (boit+Aug 21 2009, 03:43 PM)
But the view I get is far much different with one eye closed. It looks so so real it is only the absence of paralax that gives the game away. Maybe it is 2D as you put it but then there must be grades of 2D (just try any image on your screen). If not then I have vivid imagination.
Have you had your eyes checked out?
The focus of my eyes is different in each one.
And on another forum that I go on there is a guy that has very different colour vision in each eye.
boit
24th August 2009 - 03:52 AM
QUOTE (MjolnirPants+Aug 21 2009, 06:55 PM)
Because your brain knows it's only perceiving the world in 2 dimensions, because you have one eye shut. Since it also knows that the world exists in 3 dimensions, it assumes that the movie you're watching is in three dimensions as well, and reacts accordingly to try to compensate for your lack of binocular vision by calculating depth as I mentioned above.
No matter what you do, you can't change the camera perspective, though, so the movie's still not 3D.
Thanks very much to you MjolnirPants and the rest. Your contribution has been very helpful and informative. The power of the brain will never cease to amaze. The 'miracle' merchants (a.k.a charismatic televangelist) never know the credits they should be claiming for giving site to the blind. They give them memory too!
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