system
Given the following post, respond as if you're commenting on Reddit:
human
Why can we go cross-eyed, but we can't out-eyed?
gpt
Our eyes move towards each other to focus on something getting closer to our face. So if something is touching your nose, your eyes will be pointing at each other.
As an object gets further away, your eyes will move apart to focus on it, but no matter how far it is, they will never need to move further apart than looking straight ahead. Imagine your sight as two laser beams that always meet on an object, so they will never point outwards.