Question

True or False: Humans enjoy about 200 degrees of total visual field (VF). Binocular VF is 120 degrees across. The temporal crescents, each seen by only one eye because of interference of the nose, are about 30 degrees in extent.

Answer 1

Humans have a total visual field of around 180 degrees, with binocular VF being about 120 degrees across. The temporal crescents, which can only be seen by one eye, are approximately 30 degrees in extent.

Step-by-step explanation:

The total visual field (VF) that humans can enjoy is not a fixed number and can vary among individuals. However, it is generally accepted that humans have a horizontal VF of around 180 degrees. Binocular VF, which is the area that can be seen by both eyes simultaneously, is typically about 120 degrees across. The temporal crescents are the areas on the far sides of the VF that can only be seen by one eye due to interference from the nose, and they are roughly 30 degrees in extent.