Parallax Binocular

Binocular parallax is the difference in angles that are formed by visual lines when two eyes fix points at different distances. This effect plays an important role in our perception of depth and space.

When we look at an object, our brain analyzes the information coming from both eyes and forms a three-dimensional image of the object. However, if we look at a distant object, our eyes cannot accurately determine its distance. This happens because one eye sees the object closer than the other. To compensate for this difference, the brain uses binocular parallax to determine the correct distance to an object.

Binocular parallax also helps us determine depth and perspective in space. For example, when we look at a building, our brain uses this effect to understand how far away the building is and how it is positioned relative to us. If the building is far away, the angle between the visual lines will be larger, which means the parallax will be greater.

However, parallax can be deceiving. For example, if we are on the seashore and looking at the horizon, then our brain may incorrectly determine the distance to the horizon, which can cause us to feel that the ground is disappearing from under our feet. This is due to the fact that our brain cannot accurately determine the angle between visual lines and the distance to the horizon.

Thus, binocular parallax plays an important role in our perception of depth and space, helping us correctly determine the distance to objects and understand how they are located in space.