Eye vs. Camera is a fascinating TED-Ed lesson. In the lesson we learn why our eyes don't always see things the same way that they're captured with a camera. Through the lesson we learn how our eyes perceive and focus on colors compared to a camera. We also learn fun facts like why we can't watch our own eyes shift from side to side in a mirror. The full lesson can be found here. The video is embedded below.
TED-Ed offers some resources to extend the lesson. Optical Illusions and Phenomena will show students more examples of how eyes perceive light and color differently than is captured by a camera. Exploring the Anatomy of Your Own Eye is an activity set extracted from The American Biology Teacher. It contains some examples and explanations of how the human eye works.