How does having a non-circular pupil affect the way an animal sees?
In: Biology
The way I understand it is like this: herd animals like goats etc have square pupils, because they need a wider range of view. The need to see what predators could threaten them.
Predators have vertical slit like pupils because it helps control the amount of light that enters the eye. That iris configuration can allow way more light into the eye, which helps these animals be nocturnal.
Animals with round pupils, like humans, need good vision at a range that is moderately far to close up. They need to avoid things like diffraction, and they don’t need to have the ability to allow a huge amount of light into the eye, because they are diurnal.
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