system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do eyes move together?
gpt
Much like how a birds head stays completely locked in place when their body moves and for the exact same reason, your eye muscles are largely reflexive muscles.

So, just as the brain tells your lungs to move, it tells your eyes to move. And it tells both of them to move at the same time to maintain your binocular focus, either on whatever you were looking at if you move your head, or whatever direction you are shifting your gaze to look at if you move your eyes.