Parallax

Parallax is the apparent displacement or difference in position of an object when viewed from two different vantage points. In human vision, binocular parallax — the slight difference between the images seen by each eye due to their spatial separation — is a primary cue for depth perception, allowing the brain to estimate distances to objects. In accessibility and sensory substitution research, the concept of parallax has been explored as a basis for conveying depth information to blind individuals through non-visual channels, such as tactile pressure or haptic devices that simulate the convergence and divergence of the eyes.