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In very bright light, the slit-like pupil closes very narrowly over the eye, reducing the amount of light on the sensitive retina, and improving depth of field. Big cats have pupils that contract to a round point. Variation in color of cats' eyes in flash photographs is largely due to the reflection of the flash by the tapetum. A closeup of a ...
Cats are limited in their perception of color. Human eyes have 10 times more cone cells than feline eyes, meaning we can see a larger range of colors than cats, according to Purina.
Unlike we humans, cats don't have cones that are sensitive to red wavelengths — that means that they lack the light-sensitive pigments at the back of their eye that enable them to see red.
Cat hearing is also extremely sensitive and is among the best of any mammal, [17] being most acute in the range of 500 Hz to 32 kHz. [21] This sensitivity is further enhanced by the cat's large movable outer ears (their pinnae ), which both amplify sounds and help a cat sense the direction from which a noise is coming.
Deafness can occur in white cats with yellow, green or blue irises, although it is mostly likely in white cats with blue irises. [4] In white cats with one blue eye and one eye of a different color (odd-eyed cats), deafness is more likely to affect the ear on the blue-eyed side. [1] Approximately 50% of white cats have one or two blue eyes. [5]
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The high-frequency aspect of the purr may subtly exploit humans' sensitivity to these cries. Using sensory biases in communication between species provides cats with a productive means of improving the care that they receive. [19] Cats often purr when distressed or in pain, such as during the three stages of labor.
Most cat blinking is all about keeping their eyes in good condition, and while in most cases it's simply regular upkeep, sometimes cats – like us – will get something in one eye, or one eye ...