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The chances of it being completely corrected would have been much higher if her condition had been caught earlier, said Connolly, chief of pediatric and binocular vision service at Indiana University’s School of Optometry.

To do so you have, in effect, to move from monocular vision to binocular vision.

Ennos argues that our forward-facing eyes with binocular vision, upright posture and differentiation between hind limbs for locomotion and forelimbs for gripping all evolved for living in canopies.

Parallax works on the same principle as binocular vision, which enables humans to roughly estimate the distance to an object by pointing both eyes on it.

Unlike birds of prey with forward-facing eyes and binocular vision enabling good depth perception, the eyes in Oculudentavis faced to the sides and bulged out of its head.