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In this activity, learners conduct a simple test to find their blind spot.

In this activity about light and perception, learners create pictures in thin air.

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.

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.

This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.

Up close, an array of dots could look random, but take a step back, and an image forms. By tracing over an image, learners can create their own dot based image.

If you had a long tube with a 5 millimeter wide slit, would you see the entire Golden Gate Bridge?

In this activity about light and perception, learners discover how a flash of light can create a lingering image called an "afterimage" on the retina of the eye.

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

In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

In this optics activity, learners make a lens and explore how the eye manipulates the light that enters it.

In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.

In this activity (3rd on the page), learners conduct a series of tests to find out which of their eyes is more dominant.

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.

Closing one eye eliminates one of the clues that your brain uses to judge depth. Trying to perform a simple task with one eye closed demonstrates how much you rely on your depth perception.

In this artistic activity, learners blow up a smaller picture into a larger one, by using a grid.