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Create an illusion where it appears that your hand has a hole in it. You'll see the results from when one eye gets conflicting information.

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict?

This fun hands-on astronomy activity uses a variety of simple props to help learners understand why they see what they see in a telescope.

In this activity related to light and perception, learners use a pinhole in an index card as a magnifying glass to help their eye focus on a nearby object.