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- Rats Have a Double View of the World. May 27, 2013.
- Scientists from the Max Planck Institute for Biological Cybernetics in Tübingen, using miniaturised high-speed cameras and high-speed behavioural tracking, discovered that rats move their eyes in opposite directions in both the horizontal and the vertical plane when running around.
- Each eye moves in a different direction, depending on the change in the animal's head position.
- An analysis of both eyes' field of view found that the eye movements exclude the possibility that rats fuse the visual information into a single image like humans do.
- Instead, the eyes move in such a way that enables the space above them to be permanently in view -- presumably an adaptation to help them deal with the major threat from predatory birds that rodents face in their natural environment.
- Like many mammals, rats have their eyes on the sides of their heads.
- This gives them a very wide visual field, useful for detection of predators.
- However, three-dimensional vision requires overlap of the visual fields of the two eyes.
- Thus, the visual system of these animals needs to meet two conflicting demands at the same time; on the one hand maximum surveillance and on the other hand detailed binocular vision.
- AltynbekMay 2013投票しよう!
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