Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The three-dimensional conical structure of the visual field. For the right eye, the boundaries of the field are 100 degrees temporal and 60 degrees upper, lower, and nasal. The apex of the cone is at the nodal point of the eye, where light rays converge on their way to the retina, forming the perimetric angle.
