The non-image-forming visual pathway influences mood and other aspects of light perception.

“I want to ask you about a different aspect of the visual system now, which is the one that relates to our sense of balance. So I love boats but I hate being on them. I love the ocean from shore, because I get incredibly seasick, it's awful. I think I'm going to get seasick if I think about it too much. [laughs] And once I went on a boat trip, I came back and I actually got motion sick or wasn't seasick 'cause I was rafting. So there's a system that somehow gets messed up. They always tell us if you're feeling sick to look at the horizon et cetera, et cetera. - Right. - So what is the link between our visual system and our balance system and why does it make us nauseous sometimes when the world is moving in a way that we're not accustomed to? - Right. - I realize this is a big question, because it involves eye movement, et cetera. - Right. - But let's maybe just walk in at the simplest layers of vision, vestibular, so-called balance system and then maybe we can piece the system together for people so that they can understand, and then also we should give them some tools for adjusting their nausea when their vestibular system is out of whack. - Cool, so the first thing to think about is that the vestibular system”