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So people may interpret an image as two different objects.

This can often be due to background or contrast.

Our brian is forced to choose one image; often times, the choices may be made based on our past experiences.

Cool, our brain is used to a 3 dimensiosal world, and so it often tries to make 2 dimensioan objetct turn 3D.

So the drigram above shows what an eye looks like and the digram below show how we see the image.

And that is how the Eye works!! I am hungrey lets go and eat!