When a person stares at an object, the two eyeballs rotate sideways to point to the object, so that the object appears at the center of the image formed on each eye's retina. In order to look at a nearby object, the two eyeballs rotate towards each other so that their eyesight can converge on the object. This is referred to as "cross-eyed viewing". To see a faraway object, the two eyeballs "diverge" to become almost parallel to each other. This is known as "wall-eyed viewing", where the convergence angle is much smaller than that in cross-eyed viewing.