Do you know when cats dilate their pupils and why?
Cats change the size of their eyes according to light. When it is dark, they try to gain vision by dilating their pupils to allow more light to enter their eyes. Also, when they feel excited or become fearful, they increase the size of their pupils to focus better on their target.
It is amazing to see how they change the size of their eyes in just a matter of seconds. Check out the videos below to see it in action:
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Image via flickr: valgonzarp