[citation][nom]bystander[/nom]We have 2 eyes because we use binocular vision. We don't judge depth primarily by shadows, we judge depth by how our eyes align on an object, which is EXACTLY the same way 3D vision works. Both eyes will point at an object, because they are separated by a couple inches, they will point inward at different angles to achieve this. That is what 3D vision does. It causes your eyes to angle the same exact way we do in real life. If you ever try to focus on an object right in front of your nose, for example, you go cross eyed. (This cross-eyed effect can be problematic with 3D vision, because sometimes they screw up the depth and it causes your eyes to go cross-eyed in the extreme. This is likely why it's not advised for kids. It's not because 3D vision doesn't work, it's because the games have bugs).The only thing that 3D vision is not able to emulate, at least not at this time, is how the individual eye focuses on those images. We do judge by shadowing as well, but that's 2ndary, and 3D vision adjust shadows based on your perspective as well, so that's not different either.[/citation] thats not true. 3d works by drawing two images simultaneously and the shutter glasses lets one eye see at a time back and forth rapidly tricking your eyes to see that image at a different location. Not what our eyes naturally do. I wouldn't recommend this for your eyes health. I could see some endused siezures coming out of this.