Visual Cues and Constancies

Our visual system uses a range of cues to construct our perception of the world. These cues help us judge depth, distance, size, and shape — even though the image on our retina is flat and two-dimensional. Additionally, our brain maintains perceptual constancies that allow us to perceive objects as stable and unchanging despite variations in the sensory input.

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Monocular Depth Cues

Monocular depth cues are cues that require only one eye to perceive depth and distance. Because they work with a single eye, they can also be used in flat images such as paintings and photographs.