Stereopsis is the perception of depth and three-dimensional structure obtained from the visual information received by both eyes. This phenomenon occurs because each eye views a slightly different angle of the same object, allowing the brain to combine these images into a single, cohesive perception of depth. This ability is crucial for tasks such as judging distances and navigating through space. Stereopsis relies on binocular vision, which is the use of both eyes working together, and is an essential aspect of human vision, contributing to activities like driving and playing sports.