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depth perception
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Two diagrams compare how the eyes process visual points: the left shows corresponding points on each retina (aL with aR, bL with bR) receiving light from the same objects, while the right shows noncorresponding points (b'L and b'R) receiving light from different locations, illustrating the difference in image alignment between the two eyes.
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depth perception

Also known as: stereopsis
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Two diagrams compare how the eyes process visual points: the left shows corresponding points on each retina (aL with aR, bL with bR) receiving light from the same objects, while the right shows noncorresponding points (b'L and b'R) receiving light from different locations, illustrating the difference in image alignment between the two eyes.
corresponding points of vision The distinction between corresponding points (aL and aR, bL and bR) and points that do not correspond (b′L and b′R).

Depth perception is the ability to judge the distance of objects and their spatial relationships. Even though the image on the retina is two-dimensional, humans can perceive three-dimensional space. This is achieved through various cues, even when viewing with a single eye (monocular cues).12

Monocular cues include:
* Apparent movement: Objects nearer to the observer appear to move in the opposite direction of head movement relative to more distant objects.2
* Perspective: How an object's appearance changes when viewed from different angles helps in judging depth. Familiarity with an object's true shape aids in interpreting its two-dimensional representation.2
* Light and shade, overlapping contours, and relative sizes of familiar objects also contribute to depth perception.2

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2 Britannica Sources
  1. depth perception
  2. human eye - Monocular cues

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