Human eyesight is characterized by eye coordination, which is the ability of both eyes to work together as a team. Each of your eyes sees a slightly different image. Your brain blends these two images into one three-dimensional picture through a process called fusion. This makes us able to better estimate things like distances between objects. This binocular vision is typical of primates and predators, for whom accurate estimation of distances is necessary for survival.

Even a weaker ability to estimate distances is sufficient for a rabbit, as long as it can be used to distinguish movement from the largest possible area. The rabbit finds its food by pressing its head down. The rabbit's eyes are on different sides of its head, which means that it has no binocular vision.