[bregma]

Like hearing and balance are both in the same sensory organ, and consist of sensitive hairs in liquid-filled chamber? Or the pancreas, which consists of separate endocrine and exocrine glands in one wibbly wobbly visceral organ? Nature would never do things like that.

[Confusion]

I don't agree hearing and balance are the same sensory organ. They are two separate organs, just very near each other and indeed resembling each other, which explains why they are near each other.

The thought I was expressing is that there seems to be no separate organ at all here and that seems unexpected to me. I would expect there to at least be something like a specialized region. Not just that the eye in general happens to also have this ability.