What is Vision?
Simple
Eyes
The
Brain and Eye
The
Single-Lens Eye
Anatomy
of a Single-Lens Eye
The
Compound Eye
Anatomy
of a Compound Eye
The Eyes Have
It
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What is Vision?
An animal depends on its senses to survive in its environment. An important sense is vision, or sight, which is the sense that detects light. Light can indicate many things an animal needs to know to survive. It can indicate the time of day, the time of year, or the presence of heat. It can indicate the presence of prey, predators, or mates (see Bioluminesence).
An animal senses light with its eyes. Eyes can be simple light-sensitive cells that don't see images, or complex organs that see light, shadow, color, shape, and depth.
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