Given an open-ended topic (movie name, a persons name, an event, sports, etc) generate a simple trivia-type question.
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Question: cat's eye

Answer: Who invented the road safety feature 'cat's eyes'?

Question: amazon

Answer: Deluded by a legend, Francisco Orellana and Gonzalo Pizarro departed from Ecuador in 1541 in a disastrous expedition towards the Amazon Basin; they did not find any gold or lost cities but Orellana became the first person to navigate the entire Amazon River. What were they seeking?

Question: double vision

Answer:
Double vision, the perception of two images from a single object, is properly called what?