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Optical illusion

Necker cube

Is the red dot on the near or far corner?

Stare at it for a while, what happens?

This is a three-dimensional cube. One face of the structure is cream in colour, the two faces adjacent to it, and to each other, are light blue and the other faces are clear, so that all eight corners of the cube are visible. A red dot is in one of these corners. Depending on which way one views the cube, it appears to flip so that the red dot is sometimes inside, and sometimes outside the cube. It is possible to concentrate on the image and change between these two conflicting perspectives.

For a description of the image place your cursor over it (certain browsers only).

Answer

Did you know?

Eating brocoli, spinach and other similar vegetables regularly can help prevent eye disease. Find out more