[dungdang]

do you have a source for that? because my source: one closed eye, tells me very clearly i do use binocular vision for 3d - 3d being how far something is.

you don't need 'much' information. you know the distance between the eyes, and then you have the 2 lines from each eye to the object. that's called a triangle. do you know how to calculate the height of a triangle? because that's your distance.

[regularfry]

If you read my comment again, possibly all of it this time, you'll see that I'm not saying that we don't have or use binocular vision. I'm saying that there's a limit to how far out it's useful. That means adding a second camera is only going to be useful for a small number of tasks.

Messing about with triangles is called convergence. The accuracy falls off quite quickly with distance, and it's completely useless out past about 10m. Your brain has much better sources of depth cues before that point.

There are at least another 12 mechanisms humans use for depth perception, only one (arguably two) of which uses both eyes. I'll let you do the googling.

[dungdang]

i don't need to 'google' what closing one eye does. that's the whole point of my comment. you claim it's unreasonable when people use their eyes for basic information. i say having to google what your own eyes tell you is what is unreasonable.