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Aeromedical factorsQuestion 898 of 934

What is empty-field myopia?

  1. The eyes lose all sense of color at dusk and in low light conditions
  2. The eyes see a fixed light move in the dark
  3. The eyes cannot focus on the instruments
  4. The eyes relax and focus at 10 to 30 feet with nothing in sight
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Correct answer: The eyes relax and focus at 10 to 30 feet with nothing in sight

It usually occurs above clouds or in a haze layer. It means looking without seeing.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 17: Aeromedical Factors — Vision, page 444

Practice aeromedical factors

Questions last reviewed: 18 October 2026