Vision
A field of view is a world that can be seen through vision at any moment, also known as a field of vision. Different animals have different fields of view, depending on the location of the eye to determine the size of the unit to represent the size. The human field of view is 180 ° facing the front, some birds have 360 ° field of view, and the field of view has a different range in the vertical direction. The ability to visualize in the field of view is not exactly the same, in different types of animals are also different. For example, stereoscopic vision has a close relationship with depth of field, the human stereoscopic vision is only 140 °, and the rest has no stereoscopic vision at 40 ° of the edge (because the images within those angles do not overlap with each other) Less than 20 ° or even 10 ° stereo vision. The color of the various colors are also different: green minimum, red larger, larger blue, white maximum; this is mainly due to the feeling of different wavelengths of light cone cells are more concentrated in the retina center. ...