Two Eyes, One Focal Point

Scientists claim we see two sets of images at all instances, but it sure doesn’t feel like it. In our everyday experience, it’s not like we sometimes think we’re seeing double (mind the occasional heavy drinker). So, what’s going on?

Fortunately, humans are well-made machines! Our eyes are usually fixated on two severely-constrained optic axes. These optic axes force our eyes to look at the same single point, making it impossible for one of the eyes to “see” something the other does not. That’s why binocular stereopsis works, and that’s why we can’t just tell one of our eyes to look one way and order the other to do the opposite.