3D - 2

When you watch a photograph or even TV, with one eye closed, you get to see 3D image. Why is this?

A photograph taken using a SLR camera with near and far subjects will give you clear 3D impression. Also, you need to concentrate and look at the picture for some time, if you haven't experienced this before. Please try this yourself. Take a photograph, look at it for some time, with one eye closed. You CAN see the 3D image. By 3D I meant that you can see the depth of the image.

Public Comments

1. no you dont
2. Your brain interprets the image as 3D. your brain has been trained (from birth) to operate in 3D. Your brain makes its "best guess". Try looking at a distant object in low light especially when you are startled. It is amazing what you "think" you see before you rationalize what it is or is not!
3. When both of your eyes are open, and focused, your brain receives two slightly different 2D images. Using what it has experienced through touch (when you're a baby, you have to use your hands to realize how far each object you see is), it correlates the differences in each image to distance. That's the basis of many optical illusions. When you have one eye closed, your brain only receives one image, and that's 2D. It then makes a wild (though educated, using things such as relative sizes and common sense) guess at what the other image would be. That way it forms a 3D image. But that's only a guess your brain is making. You still have to open both eyes to get a real 3D image. The same way, when your eyes are not focused correctly, your brain gets images that are way too different, and by using the usual criteria as when both eyes are focused, it forms a false image, which explains the "double sight".
4. because Ur focusing lot more then regular b/cuz ur not sure wat u r seeing and u r mind dosent work unless u dint have all details and dats y u see 3d image.
5. Sorry, it's not 3D. Move to one side. Do any of the elements in the photograph move in relation to each other? Do the items in the foreground now hide different elements in the background? If the image was 3D then they would.
6. you are mistaken only the distance of the image changes so you see two different depths of picture
7. Try it with a magic eye picture (remember those). Can you see it now? No you can't.