Nägemisvöönd

Nägemisvöönd refers to the circle of potential visual targets around a person that are visible within a certain angle. The radius of this circle is determined by the interocular distance of the human eyes, which is typically around 6.5 to 7.5 centimeters. For most people, this corresponds to a visual angle of around 60 to 70 degrees.

When considering the relationship between the size of objects and the distance from the observer, the nägemisvöönd is utilized to create a visual field that can accommodate all points within a given angular distance range. Objects with sizes that result in an angular size below this threshold are typically hard to detect, as their angular sizes do not provide sufficient information for the human visual system.

The principles of visuell ärqaamimuus, which relate to the fact that visual acuity depends on the angular size of the object, can be used in conjunction with the nägemisvöönd to estimate measurable values for perceptive visual range and resolution. This understanding is important for applications involving distance perception, such as finding obstacles and securing collision-free navigation.

While it is influenced by environmental factors like ambient lighting and visibility, the nägemisvöönd provides a predictable, relatively constant radius of focus for objects visible within a 60 to 70 degree angular range.