Humans have in fact two eyes.
the comon eye sight for humans is the pupil
1. How is a human eye different from a fly's eye?
Humans have a structure in their heads called the pineal body or gland. It isn't an eye, and in humans it's really not even vaguely eye-like other than being sort of approximately round.
They both reflect light.
purple
Humans cannot see in dark night but nocturnal animals can see.
Melanin.
yes they do
no
Yes.
Melanin.
No. Where did you get that idea?