Tigers have binocular vision which enables them to judge distances when hunting their prey.

Because of their ability to judge distances when stalking or ambushing prey.

The stripes on the zebra breaks up his outline and makes it harder for the predators to judge distances.

The human brain can judge distance merely by practice. A baby can't properly judge distance yet. Most people simply don't practice on vertical distances nearly as much as horizontal. Also, it's much harder to verify your judgment if you do try to practise.

The binocular vision is the ability to see in three dimensions and to judge distance. And its important because it will help us judge distances more accurately. So if we didn't have binocular vision, it won't give us more information about certain parts of our eye.