The text suggests that prey animals have horizontal pupils for scanning the horizon while predators have vertical pupils to focus on prey.

Both claims about pupil shapes in prey and predator animals are supported by multiple sources which indicate these are adaptations related to their ecological roles. Prey animals, such as grazing herbivores, have horizontal pupils to enhance ground scanning for potential threats at the horizon. Predators, particularly ambush hunters, have vertical pupils that aid in depth perception and distance judgment necessary for capturing prey. The evidence from medium-reliability sources generally supports these claims, though the lack of high-reliability sources warrants a moderate confidence.