What animal has a good eye sight?

Answer 1

Answer 1: Many animals have excellent eye sight...

...but it kinda' depends on how one defines "good" eyesight. Birds of Prey (eagles, hawks, owls, etc.) actually have areas of their vision which are extraordinarily magnified. That's why and how a bird of prey can circle in the air many, many feet over a field and see a tiny rodent (usually a field mouse) scurrying about, below. Eagles have that, plus something akin to polarization (but it's not really that) capabilities so that light's reflection on the water won't inordinately impede their ability to see fish swimming around beneath.

Some animals can also see quite well in what seems to humans like near total darkness... the earlier-mentioned owl, for example; or virtually any nocturnal animal, especially those with very large eyes. Even a common house cat -- or even a dog, come to think of it -- can see remarkably well in what most humans perceive as near total darkeness. That said, cats -- and especially dogs -- don't see certain colors anywhere near as well as humans (at least humans with normal vision).

Some say that bats can see extraordinarily well in total darkness; and, indeed, their nighttime vision is very, very good. However, bats use mostly echo location to find their prey.

Different animals have different vision (and hearing, too; but this question is about sight) capabilities which have evolved, over the ages, to accommodate their lifestyles and methods of hunting or whatever are the means by which they acquire food. Since most animals, in the wild, spend an extraordinary amount of time each day acquiring food, their eyesight tends to have fairly narrowly evolved to accommodate it.

Some creatures' eyesight is very difficult for humans to understand: The common housefly, for example, sees entirely differently from the lensed optical way that humans -- all mammals, in fact -- see. Of course, many insects have methods of seeing which are completely foreign to humans.

Answer 2

an eagle