The Human Eye (03:49)

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Sight is the most important sense for many animals; eyes distinguish proportions, shades, and colors. By calculating the images from both eyes, the brain can interpret perspective and distance. Anatomical parts include iris, pupil, crystalline lens, retina, optical nerve, rods, and cones.

Animals (03:45)

Some animals do not see but are sensitive to light. Others need excellent sight to hunt. Learn about different species unique vision that has adapted to its needs.

Insects (01:35)

Insects have compound eyes resulting in mosaic vision. The praying mantis needs 1/500th of a second to trap prey.

Summary (03:10)

The human eye can distinguish up to 7 million colors, proportions, shades, colors, and perspective. Learn the parts of the eye and their functions. Single-celled animals only distinguish the presence of light. Some animals have a highly developed sense of sight.

Credits: The Sense of Sight (00:39)

Credits: The Sense of Sight