While it's a much-debated comparison (and I'm not sure there's any definitive answer), 180º sounds far wider than the usual human field of vision. Stare straight ahead, don't move your eyes and head, move your hands apart until they disappear. For me it seems not much more than 90-100º.
That's interesting . Some say that 99% of what we see is produced by brain. Everyone's brain developed a bit differently, we are all unique. So, we don't have to agree on one number here .
How wide can you see with one eye, while staring straight ahead? From center to the edge. I think it is ~85º. We can't be that much different. Tell me it's at least 70º .
Yeah, 85º seems right for each eye alone. Since they overlap a lot, the two together can't be 180º then, right? Even if they didn't overlap at all, it would come to only 170º.
We need a circle to put it heads into... it isn't 180, but it isn't only 85 degrees per eye.
Ok do a rudimentary test while in here in the bathroom stall... with motion, which is current than without motion.
Right eye... looking straight ahead... I have around 155 degrees of vision... looking straight ahead...
Ditto the left.
No it isn't all in focus, but I can see what is too the right and left.
Provided my total angle of vision is 170 degrees, that means there is 20ish degrees that isn't over lapped when looking straight ahead.