Vision · Question 8 of 12

Approximately how long does it take for the eyes to fully adapt to darkness?

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Answer

  • C About 30 minutes

Explanation

The cones adapt within a few minutes, while the more light-sensitive rods need about 30 minutes for full dark adaptation. A single bright flash of light can undo a large part of this adaptation. For this reason, dimmed cockpit lighting is used before night flights.

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