His nostrils expand to enhance his excellent sense of smell.Įquine eyes are eight times larger than human eyes in fact, they are larger than those of any other land mammal. He pricks his ears because he cannot see stationary details well. Focusing on the bird’s location, the horse is trying to improve his view by raising his head and enlarging his eyes. This impressive display of intelligence and sensitivity is sometimes called the “look of eagles.” But it stems from how equine vision works. Walking in an open field as a bird flicks a wing in the distance, a horse may raise his head, point his ears, flare his nostrils and widen his eyes. Horses often give the impression of superb vision. His brain is less prone to illusions and assumptions than yours is. So, who’s more objective in seeing reality, you or your horse? Hate to break the news, but it’s probably your horse. This wiring is infrastructure for perceptual interpretation: the effect of knowledge being melded with the eye’s pictures of the outside world. But the human brain sends back six times as much neural information in the opposite direction, transmitting messages to the sensory relay station that captures incoming views. Visual information travels from the eye to the brain in both species, of course. Neuroscientist Gerald Edelman said it best: “Every perception is a creation.” The trouble is that horses create their perceptions in ways that are very different from ours. At the next glance, they’re still stopped, but in different locations. Cars travelling 60 miles an hour become a series of still images stopped along the road. Imagine trying to cross a busy street with eyes that function normally but a brain that can’t perceive motion. Occasionally, a smidgen of visual cortex is impaired so specifically that its owner-having otherwise normal sight-suddenly cannot see color, shape or perhaps movement.
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