There are three types of color receptors in your eye: red, green and blue. But how do we see the amazing kaleidoscope of other colors that make up our world? The following learning module explains how humans can see everything from...

In this lesson, students investigate the properties of light using simple materials. Includes handout and video resources.

Teach students to remind themselves (and train their eyes and brains) to go from top to bottom, left to right and page by page! This activity includes a catchy song to the tune of Mary had a Little Lamb to help students remember this...

Are nature's complex forms evidence of "intelligent design"? In this Evolution essay, biologist Kenneth Miller explains how the processes of evolution account for complex structures such as the human eye.

Take a look at this article to learn about the different parts of this amazing part of the body that's at work from the moment you wake up until you close them to go to sleep.

This reference gives a quick-access look at the structure and function of the iris reflex in the human eye. Includes an organized flow chart showing what happens inside the eye. Hover the mouse over terms to see their definitions.

Learn about what causes eye twitching and some interesting superstitions in different cultures.

Labeled illustration of the principal parts of the eye.

This government site explains the function and structure of the cornea and includes a diagram with labeled parts of the eye.

After discussing the basics of the eye, this site explores the various functions of the eye and parts from the optic nerves to the retina. Cones, rods, and the brain are also discussed.

Lesson plan includes various models, activities, and games that teach students basic information about the eye.

Find out what you know about the eye by completing this crossword puzzle!

Earthworms and other simple animals like the starfish have a different eye structure known as a 'simple' eye.Learn about its anatomy and how it functions.

[Free Registration/Login Required] Students explore the concept of the eye by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about the concept...

Try this experiment where you examine the blood vessel network of your retina and the eye's blind spot. Includes a safety precaution.

Optical illusions are images that seem to trick our minds into seeing something different from what they actually are. But how do they work? This learning module walks us through a few common optical illusions and explains what these...

This resource provides complete, mini-learning modules about different aspects of the human body. Click on the eyeball to focus your search.

This informative site examines the role of the key parts of the crocodile. It specifically looks at the structure and function of the teeth, feet, tail, nostrils, skin, stomach, eyes, ears, and throat.

Learn how the sense organs are structured and how they function to provide you with five senses.

In this unit you will be introduced to the complexity of living things. It also reviews the kingdom of nature, differentiating between their main features from those who are microscopic unit-cellular to the multi-cellular visible to the...

The focus of this site is the anatomy of the eye. The site include diagrams and slides showing details at the light microscope and electron microscope level.

This is a ten-question quiz pertaining to sight.

Try this experiment to see how light affects the size of your pupils.

This is a four-question quiz related to the "Sight (Vision) -- Passage 2."