What Are Binocular Cues?

Binocular parallax, sometimes called stereopsis, is a type of depth clue. The closer the object is to the observer, the greater the difference between the objects seen by the two eyes, which forms a binocular parallax. The brain can use this measurement of parallax to estimate the distance from the object to the eye. ^[1]

Binocular parallax

Right!

Binocular parallax, sometimes called stereopsis, is a type of depth clue. The closer the object is to the observer, the greater the difference between the objects seen by the two eyes, which forms a binocular parallax. The brain can use this measurement of parallax to estimate the distance from the object to the eye. ^[1]

Means due to normal

Two people

Binocular parallax is important for perceived depth and distance. When the image of the object falls on the corresponding part of the omentum of the eye, people see a single object; when the image of the object falls on the non-corresponding part of the omentum and the difference is small, people will see the depth and distance; Parallax is further increased and people will see double images. The depth cues of both eyes change with increasing distance. When the distance exceeds 1300 meters, the visual axes of the two eyes are parallel, and the parallax of the two eyes is zero, which does not help judge the distance. ^[2]