I interviewed at PCO and it was really laid back. There were only two of us but we talked to a dean first and watched a video about optometry. She asked us to tell her a little bit about ourselves. Then we went to the open file interview by ourselves. My interviewer asked me questions about the field and what are the challenges, as well as other simple questions. Then we talked about my file - OATs, grades, extracurriculars. Don't worry about it! I was super nervous and when I sat down with them, it became really relaxed. It was a great experience. Good luck!