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Fun Science: Optical IllusionDisappearing Act
Scientists use optical illusions to study how the brain allows itself to be tricked. Can you be fooled? Try an experiment and see.
You will need
Fox and Rabbit The diagram at right

Here's How

Stand at arm’s length from your computer screen. Then close your left eye and focus your right eye on the fox in the drawing. Slowly move toward your screen, so your eyes are close to it—and see the rabbit disappear!

Why?

Each eye retina has a blind spot where there are no light-sensitive cells. This illusion demonstrates the blind spot of your right eye.

Try another illusion trick.

Text by Julie Vosburgh Agnone
Art by Gregg Valley

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