SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/pilot-dark-adaptation

About how long does complete dark adaptation of the eyes take?

At least 30 minutes in total darkness.

  1. At least 30 minutes ✔
  2. About 5 minutes
  3. About 2 hours

Why: The eyes slowly grow more sensitive in darkness. Full adaptation takes at least 30 minutes, though dim red cockpit light gives moderate adaptation in about 20. One look at a bright light undoes it in seconds.

Huh, didn't know that: To keep some night vision while using a flashlight, the AIM suggests closing one eye.

The dad joke
Why did the sun go to school? To get a little brighter.
Like this card?
Play the game

Sources

  1. Aeronautical Information Manual 8-1-6, Vision in Flight https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap8_section_1.html

Test yourself in the game

Flying & DronesWhen scanning for traffic, how big should each eye movement be, per the AIM?Flying & DronesWhat's the best way to scan the sky for other aircraft?Flying & DronesAbout how long do your eyes need to fully adapt to darkness?

That's stuff everyone should know.