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Posted by iZs mom on August 08, 2002 at 11:00:58:
wonder if this headbobbing info applies to some of those sloooooooooooow deliberate headbobs i've seen iZ do???
Bon.
What do Rabbits See?
"Depth perception is another important aspect of viewing the world. It is the ability to determine how far away things are. This is done by viewing the world from two different angles. In humans, who have both eyes pointing forward in the head, there is a large overlap between what each eye sees. This overlap is interpreted by the brain, and what results is a three-dimensional view of the world. Rabbits, on the other hand, have paid for their enormous visual fields by having a very small overlap between images seen by each eye. Thus, a rabbit only has about a 30 degree area directly in front of him where he has depth perception, and 10 degrees of this is his blind spot! There are other ways to gauge distance, and rabbits may use these. One is to pick up on subtle visual cues, similar to the ones we notice when we watch a three dimensional scene on a two dimensional television screen. These include size differences between objects and the blurring of far away objects. Another interesting method which rabbits and other animals, such as birds, employ is to bob up and down while looking at an object in the distance. If an object is close, it will appear to move more than an object that is far away (this is known as parallax), and an estimate of its distance can be made."
