Yeah my interview with Western was super casual! It started with an interview that felt around ~30 mins with 2 faculty and it was very enjoyable. Very welcoming and not stressful. They asked questions like "why optometry?" "why western?" etc. So just speak from your heart and talk about your passion and it will show. Other than that, the rest of the day was a tour of the campus and that was it. GOOD LUCK! Just have confidence and you will do great! Be honest, ask questions and it's a great school and you were asked to interview because they liked you!