I'm excited to hear that you're interested in SCCO! I had my interview there just last year...as for what to expect. All of the faculty, staff, and students at the College are pretty warm and friendly. Main thing is to "be yourself" and just really know why you want to go to optometry school, and why you think that SCCO would be a good fit for you. Instead of being nervous, be excited at the opportunity to show your stuff and to make yourself known personally to your interviewers.
Other than that, you'll also be given a tour of the campus.