Cat pupils dilate in order to absorb more light so that they can see the surrounding objects clearly. When cats are nervous, happy or excited, their pupils will also dilate. When a cat dies, its pupils will dilate just like people.

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The cat’s pupil has the function of constriction. Generally, it is a line when the sun is strong. When the light is weak, the cat’s pupil It will be enlarged to receive more light, thereby making its vision better. This is also the reason why cats can be active at night.