I have amblyopia—also known as lazy eye—which means I often see a bit of double vision—usually a sliver duplicated on the outside side of one of my eyes, even when I’m wearing contacts, and even though I don’t look like I have a lazy eye. My eyes definitely don’t work in concert and I’m told my 3D vision resembles what people see when they look at a postcard.
Finally, when I use binoculars, I use only one eyehole up to the non-lazy eye… So I’m wondering what exactly you normal people see out of binoculars? Is it like Looney Tunes?
You’re thinking of a monocular or telescope.
I gather you have never actually used a binocular. In reality, a good binocular has a wide FOV that you barely notice a border on the peripheral vision. At worst, you see a single circle around your vision, not two overlapping circles, that’s just Hollywood shorthand, not something that happens in real life.