Research overview: forward-facing eyes, stereopsis, and the slit pupil

Cats have forward-facing eyes with substantial binocular overlap, giving them stereoscopic depth perception that complements any depth cues from pupil shape. This overview surveys how binocular vision and the slit pupil may work together to support the accurate close-range distance judgments an ambush predator needs. Forward-facing eyes sacrifice the wide field of view enjoyed by prey animals in exchange for overlapping views that enable triangulation of depth. The survey discusses how this binocular arrangement, paired with the slit pupil's proposed blur and depth-of-field cues, could give cats robust distance estimation when preparing to pounce. It contrasts this predator configuration with the laterally placed eyes and horizontal pupils of grazing prey. Considering stereopsis alongside pupil shape underscores that feline distance perception likely draws on several cooperating mechanisms rather than any single feature of the eye.