A 50 year old female presents to the ER complaining of severe nausea, vomiting, and headache which all started today. She also gets halos around lights in her vision and severe eye pain.
*EDIT At 8:00 PM. It sounds like this one is tricky. Upon further questioning, you learn that the halos around the lights did not precede the headache and are currently happening. Your preceptor rifles through some books and finds you a "classic" picture of this disease:
Both images shown under fair use.