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Where is it?

When you look at an object, each of your eyes sees a slightly different picture. These signals are brought together in the brain, to help tell how far away an object is. This is what enables us to see 'magic eye' pictures. Other clues like shadows, textures and prior knowledge also help us to judge depth and distance.

You need both eyes to work out exactly where an object is.
You need both eyes to work out exactly where an object is.
Photodisc

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