system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: With just my eyes, why can I look totally left, right, cross-eyed but not apart (left with the left eye, right with the right)?

If they can make the movements of far right and far left together, why not separate actions, like a lizard?
gpt
Our eye's aren't wired that way.

We evolved our eyes to give us binocular vision which greatly improves depth perception and is almost always present in predators (of which humans are).

Being able to split focus like that isn't all that valuable because our field of view isn't wide enough.  There's more value in seeing what we can see really well then being able to see a little bit more less well.