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.
reach: rather globalcatseyesnatureopticsphotographyphysicszoology
Answers by country
to have sharper vision
to better see in the dark
to be more attractive
it is a useless mutation
answers
Canada
98
Australia
103
Spain
89
Italy
74
Switzerland
110
the Netherlands
52
Poland
25819
Germany
1021
Ukraine
133
Pakistan
77
Belarus
64
Unknown
48
the United States
1173
Russia
285
Austria
178
the United Kingdom
441
India
917
Uruguay
54
Kazakhstan
53
the Philippines
90