The Human Eye: Main Characteristics of the Sight
Human Sight is a complex sense
Its characteristics vary depending on the surrouding light,
connected sensory input
The Purview
(Field of View), when eyes are motionless:
-
HORIZ: 90° (temple) + 45° (nose) = 135° (with only a
2° high resolution central cone)
-
VERT: 45° (up) + 70° (down) = 115°
-
Binocular vision: 100°-120°
An eye can move 15° in all direction at 600°/s
The Purview , when head is motionless:
-
HORIZ: 170° for one eye (NB. 120° for very good HMD), 210°
for both (~ 200°)
-
VERT: 145°
The Purview , when head moving (for one eye):
An head can move at 800°/s
-
HORIZ: 200° (temple) + 130° (nose) = 330°
-
VERT: 140° (up) + 170° (down) = 310°
Visual Acuity: between 30'' to 2' of angle
I.e., 30 arc-seconds to 2 arc-minutes
Where an arc-minute is 1/60th of 1°