(I am dispensing new glasses to a customer.)

Me: “Okay, now take a look around the store. Is your distance coming in clearly?”

Customer: “Yes, but it’s backwards.”

Me: “Backwards? What do you mean?”

Customer: “The sign…the letters on it are backwards.”

Me: “Which sign?”

Customer: “The one in between the frames.” *customer then turns around and looks out into the store* “Now the sign looks right, but when I look this way,” *turns back around to face me* “…it’s backwards. This has never happened before! What’s wrong with my glasses?”

Me: “Ma’am, are you looking in the mirror behind me?”

Customer: “Oh! That must be it! Well then, my glasses are working wonderfully. Thank you!”