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How long in total darkness do the eyes need for complete dark adaptation?

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  1. 5 minutes
  2. 30 minutes
  3. 2 hours

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References

  1. FAA AIM 8-1-6 Vision in Flight www.faa.gov/air_traffic/publications/atpubs/aim_html/chap8_section_1.html Checked 2026-10-10.
  2. FAA AIM 8-1-6 Vision in Flight www.faa.gov/air_traffic/publications/atpubs/aim_html/chap8_section_1.html Checked 2026-10-10.

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