Eye to eye
Question: Why do some animals have a noncircular pupil? Cats and some snakes
have a vertical shape yet horses and goats have a horizontal one. What is the
reason behind the differences and, more importantly, how do the different shapes
affect how animals actually see things?
Not enough is known about what different animals see to provide a final
answer but we can guess that slit pupils do provide advantages in the range of
light adaptation and the depth of field they provide. The distribution and type
of receptors on the retina will be just as important…
