Measuring Visual Acuity

Our bodies have some amazing capabilities, but there are some limitations. Explore the limitations of the human eye through the eighth lab activity in a series of 12 biology lessons. Individuals measure their own peripheral vision...

From the iris and retina to glasses and contact lenses, learners will be excited to see what activities are in store for them as they learn about the complex organ of the human eye.

A video explains the two most common vision problems, nearsightedness and farsightedness. It includes detail of what causes each and how they can be corrected using lenses and surgery. 

This video looks at the sense of sight and how light hits the photoreceptors in the eye, communicates with the brain, and translates the information into images we can see.

Can an organism with no eyes still see? As it turns out for the purple sea urchin, the answer is yes. In a short video, scientists explain why they believe that some sea urchins can use their spikes to visually sense the environment. 

Describes the contributions of scientists over hundreds of years leading to our current understanding of the eye and vision.

Vision or sight is one of the most important senses that animals can have. Learn about the anatomy of the different kinds of eyes .. simple, single-lens, and compound. Puzzles and games are included.

A high-level scientific explanation of the way the eye senses light and sees images and color. Excellent graphics help you visualize complex workings of the human eye.

In this video, I explore our sense of vision. Vision is an important sense. Learn all about this sense and how the physical stimulus of light is perceived by the receptors in our eyes. [8:01]

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.