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3.6 explain how the production of two different images of a view can result in depth perception
explain how the production of two different images of a view can result in depth perception
- Some animals have forward facing eyes. This means that there is considerable overlap between the views on the left and the right. Because the two eyes are a few centimetres apart, each eye sees a slightly different view of an object.
- The images formed by each eye are superimposed by the brain, and because each view is slightly different, objects appear to have depth as well as height and breadth, that is we see in three dimensions. This is known as stereoscopic or binocular vision.
- This type of vision also makes it possible to judge distances of near objects.
- Climbing animals such as monkeys and predators such as cats have forward facing eyes, but grazing animals such as horses have eyes on the side of the head so they have a wider field of view.