Pupils view six optical illusions and explain why the visual system might interpret them the way it does. They explore how illusions distort our sense of perspective, because they deceive us into seeing what we expect to see. Students...

Students investigate vision and the anatomy of the human eye. They complete a Webquest, watch a video about the structure of the eye, take an online quiz, answer discussion questions, and read newspaper articles about activities that...

Pupils notice how various images and colors update constantly as they are affected by factors such as distance, background and lighting. They also examine how optometrists developed a standard to evaluate eyesight.