We have two eyes, so, how do we have one cohesive vision instead of two separate eyesights?
Two eyes provide stereoscopic vision, which is the same thing from two slightly different locations. We use the difference to determine distance.
If you look at animals predators have two eyes that look forward because good depth perception is an advantage in a hun.
Carnivores often have eyes that point to the sides. That way they can see a large percentage of the area around them. That way it they have a better chance of spotting a predator and have time to get away.
Compare where the eye is on a cat versus a rabbit
It is not just hunting but other things like distance if you swing and jump between branches in trees. So primate has eyes that point forward even if the are not primary predators.
The brain processes the information and compile the two images into one you can still see single images if you bring your finger up to the bridge of your nose and switch eyes and watch how your finger appears to jump from side to side.
Eyesight, stereoscopic vision and field of view https://youtu.be/kw_d5lu0UlY
Our brain actually combines the images and uses it to create depth information (this is actually how 3D movies work)
Our brain similarly ignores the blind spot we have in our vision and our nose!