Click here for an 842×768 image.
This shows the stereoscopic FOV (horizontal field of view) of the human eyes, which you can verify with a compass or a protractor.
When using a compass, a week or two ago, I kept coming up with close to 100 deg, after being told that our stereoscopic FOV is 120 deg. Now, by looking at this illustration, you should be able to understand the confusion. A 120 deg stereoscopic FOV includes our stereoscopic peripheral vision (visible with _both_ eyes, but peripheral for one). Subtract that, and you end up with *just* our stereoscopic FOV, i.e. the “total available horizontal field of view” that can be viewed in clear focus with both eyes, at any given time, when you merge your eyes on one point within that field of view.
Things People Say