You can get the concept of: The perimeter, the visual field (for white, blue, red, green), Field representation, a blind spot.
Principle: Determine the visual field of right and left eyes of the white, blue, red and green colors. Finds the possible visual field deficit (scotoma). Determine the location of the dead point (optical section manifestation of the optic nerve). Size of the visual field of both eyes and the provisions of the blind spot are determined by the perimeter.
