Did you know the horse has one of the largest eyes of all mammals? Most prey animals, such as horses, have eyes set on the sides of their heads, allowing them to see predators approaching from many directions. Horses have excellent capability of seeing movement at a distance. When trail riding, a horse may see a deer run across the trail long before humans would see the deer.

Horses use both binocular and monocular vision. Binocular vision allows the horse to use both eyes together to see directly ahead. However, their depth perception is limited because their eyes are so far apart. Monocular vision allows the horse to see on both sides of their heads, meaning the left eye and the right eye work independently and see different views.