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Fool your eyes with these optical illusions

Suitable For

Grade 5



Time Required

 <12 Hours



What’s it about?

An ‘optical illusion’ is an image that is visually deceptive or misleading. Some objects trick your eyes so that objects appear to move when they are actually still, and you see objects that are not really there at all!

Optical illusions can also often cause us to perceive objects bigger, smaller or more bent out of shape than they really are. Study the optical illusions in this science experiment to see how confusing these images can be to our eyes and brains:

Topics covered

Optical illusion, Café Wall Illusion, Hermann Grid Illusion, Hering Illusion, Retina

What will I need?


Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

An optical illusion is always characterized by visually perceived images that, in general sense terms, are deceptive or misleading. The information gathered by the eye is processed by the brain to give a percept that does not tally with a physical measurement of the stimulus source.

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