Why do cats have vertical pupils?

to have sharper vision
to better see in the dark
to be more attractive
it is a useless mutation
The sharpest image is produced by round pupils, and if cats weren’t noc­tur­nal, they probably would have round pupils like us. But the vertical pupil, in com­bi­na­tion with hor­i­zon­tal eyelids, gives the cat greater and more accurate control in dif­fer­ent types of light­ing. A cat may adjust the amount of light by moving eyelids only.

Answers distribution

to have sharper vision
to better see in the dark
to be more attractive
it is a useless mutation
answers
flagthe Netherlands
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51
flagSweden
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19
flagCanada
8%
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56
flagItaly
12%
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3%
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31
flagPoland
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15930
flagthe United Arab Emirates
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20
flagRepublic of Ireland
22%
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2%
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35
flagAustralia
20%
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flagGermany
21%
72%
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175
flagUnknown
21%
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1%
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98
flagNorway
15%
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6%
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33
flagthe United States
20%
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1%
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819
flagthe United Kingdom
20%
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5%
419
flagFrance
22%
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40
flagCzech Republic
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17
flagBelgium
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flagPakistan
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flagIndia
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flagSouth Africa
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flagthe Philippines
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29

Gender

men77%
women80%
to have sharper vision
16%
16%
to better see in the dark
77%
80%
to be more attractive
0%
0%
it is a useless mutation
5%
3%

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Why do cats have vertical pupils?
1808
67%

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Illustration: epSos.de
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