What is relative size in depth perception?

Relative size in depth perception refers to a monocular cue where objects that are smaller in appearance on the retina are interpreted as being farther away. This concept is based on the understanding that, given two objects known to be of similar size, the one that takes up less of the visual field will be perceived as more distant.

In practical terms, when viewing a scene, if you see two people of similar height standing at different distances, the one closer to you will appear larger than the one that is farther away, even if they are actually the same height. This size difference provides valuable information to the brain about their relative distance.

This understanding of relative size is essential for depth perception, as it helps us navigate and interact with our three-dimensional environment accurately. The other options address different aspects of visual perception but do not specifically relate to the concept of relative size as a monocular cue.