Stereopsis: The process by which the brain perceives and interprets these two slightly different visual images from each eye as one, creating a sense of three-dimensionality.
Convergence: A binocular cue for perceiving depth; the extent to which the eyes converge inward when looking at an object, giving an indication of distance.
Retinal disparity: The slight difference in lateral location between objects as seen by the left eye versus the right eye, helping the brain to gauge relative distances