Sight
The Extent of a horse's sight, and how it perceives the world around it, has been the cause of much debate and an increasing amount of research.
The position of the eyes on the side of the head allows the horse to have almost a 360 degree field of vision.
They do, however, have two blind spots; one directly in front of their nose, and the other extending a few metres behind their rump.
The distance between a horse's eyes and his muzzle allows him to be able to graze while also being able to watch for predators.
The fact that a horse has such a huge field of vision means that often when he suddenly sees something that has been in his blind spot, it can make him jump.
There is also a lot of research going on into the horse's ability to focus, see in color and perceive depth.
Due to their eyes being so different from our own, the horse sees the world in a totally different way from us, which is a point well worth remembering.