When your life science class is learning about the eye and how it works, you can add this activity as a demonstration of how the retina holds an afterimage. After staring at a red, green, or blue bird shape, pupils glance at a cage and see a bird of a different color inside!

Concepts

color recognition, colors, eyes, vision, light, optical illusions

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Additional Tags

perception, light, eye, optical illusion, color, reflection, science

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Pros

• A fun enrichment to your eye lessons
• A sound explanation of how the phenomenon occurs is included on the webpage

Cons

• None