I am going to guess balance, or coordination. Hope both of my answers help!
Probably, what happened to Mia's eyes is that her pupils are dilating that is why she was attracted to the man he was chatting in a nightclub.<span> According to studies, it have shown that our pupils dilate
wider than normal when we are excited about something and even someone. </span>
Negative population growth exists.
hope this helps correct me if I'm wrong:)