The vertical pupils slits found in cats, snakes, and crocodiles also give these predators a competitive edge, the team found, by allowing them to better approximate their prey’s distance by honing their depth perception and focus on the target. But not all large predators have vertical pupils.

The vertical pupil slits found in cats, snakes, and crocodiles also provide these predators with a competitive advantage, according to the study, by helping them to better estimate their prey’s distance by improving their depth perception and focus on the target. However, vertical slits are not seen in all big predators. Sheep have a panoramic view of their surroundings to watch for predators.

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