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Far-Out Corners
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Are there boxes, is this an illusion, or is this real life Q-bert? Illusions are always fun to build especially when you can build them.
See It to Believe It: Visual Discrimination
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In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.
Measuring Your Blind Spot
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In this activity, learners calculate the width (horizontal diameter) of the blind spot on their retina. Learners make a blind spot tester using a piece of notebook paper.
Drop IT!: Depth Perception
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These two activities (4th on the page) demonstrate the importance of two eyes in judging depth.
Seeing in the Dark
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In this activity (17th on the page), learners investigate why you cannot see colors in dim light.
Spinning Cylinder: Make a triangle appear on a spinning wheel
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Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.
Seeing Is Believing
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This activity is designed to accompany the PBS documentary about African-American chemist "Percy Julian: Forgotten Genius." Learners look through two cups with small holes in them to simulate what it'
Mix-N-Match Light
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This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match.
Measure Your Ability to See
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In this exercise (Activity #2 on page), learners test their distance vision to evaluate their overall eyesight.