Try one of these 33 perception activities in your classroom.

Provides an explanation of exactly what optical illusions are, and gives a few basic examples to illustrate the text.

Thorough overview of glaucoma provided for by Intelihealth. Includes information on symptoms, prevention, treatment, and more.

This webpage is a great resource for elementary teachers who are looking for activities, lessons, facts, and experiments pertaining to the eye.

An activity with an optical illusion that will have your eyes seeing it and then not seeing it! Learn the science behind what makes the dot on the page "disappear".

An activity with an optical illusion that will have your eyes seeing a cluster of boxes but is it really boxes? In this activity, explore this illusion and what happens to trick your brain to seeing what it sees.

Observe adaptation and perception in the activity. This activity will have students watching a continuously rotation spiral to see what happens as you watch it and then look away.

Explore the world of central visual pathways. The visual pathway leads from the eye to the primary visual cortex. There is a detailed visual description of this process. Check it out.

Test your knowledge of the human eye with this interactive labeling exercise.