Why do patients often complain that hospital food tastes bad? (hint: what do a lot of patients get in the hospital that can affect smell and taste? SATA: ...... cuz there are several)
How about the classic demo that has people have their noses pinched tightly and take a bite of both apple and onion? You can't tell the difference if you can't smell them.
A question on homonymous hemianopsia isn't strictly speaking the optic nerve, but it does involve sight and it's a cool thing. What is happening when the blind spot begins to enlarge over a few minutes to hours? What would be your response to that (SATA)?
Hmmm... When people have skull fractures of a certain kind, they can lose their ability to taste food. What's that all about? Classic presentation after skull fracture, look it up. You could make a cool question about that.