The study of differing or unequal visual fields, or the optical science dealing with asymmetrical vision systems.
From Greek 'hetero-' (different) + 'optics' (from 'optikos', relating to vision). This is a specialized optical or biological term.
Many animals like rabbits have heteroptics—their eyes are on the sides of their heads so they see almost completely different worlds from each eye, giving them amazing side vision but poor depth perception.
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