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why does the eyeball of a cat becomes smaller yet bigger

why does the eyeball of a cat becomes smaller yet bigger2007-11-25 12:32:28Answers:

Its the pupil your referring to, cats pupils grow larger when cranky or if in dark rooms, and in bright light it shrinks to slits.


It may be drunk? lol or high ,,, lol
Usuallly when a cat's pupil becomes bigger they are not happy. At least that is how I tell my cat is irritated or unhappy about something.
Average cats have a visual field of view estimated at 200掳, versus 180掳 in humans, with a binocular field (overlap in the images from each eye) narrower than that of humans. As with most predators, their eyes face forward, affording depth perception at the expense of field of view. Field of view is largely dependent upon the placement of the eyes, but may also be related to the eye's construction. Instead of the fovea which gives humans sharp central vision, cats have a central band known as the visual streak. Cats can apparently differentiate among colors, especially at close range, but without appreciable subtlety.
due to the change of light

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