Just a note; for some people like me the BAC is physiologically impossible. I was born with a bad lazy eye and had a couple of surgeries to fix it as a kid, as well as having to wear an eye patch. My brain missed the developmental window to learn to see stereoscopically. If someone has never been able to see the ‘magic 3D images” that’s a good sign that the BAC won’t work for them.
When I try to shoot with an occluded optic my brain simply switches dominance to the unoccluded eye and doesn’t combine the images. It’s awesome for shooting long guns on either side. Other people will simply see an occluded optic.