AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/pilot-night-blind-spot

At night, why can an object vanish if you stare straight at it?

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  1. Your eyelids close a little at night
  2. The center of the eye has no rods
  3. Cones work better in the dark

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References

  1. Airplane Flying Handbook FAA-H-8083-3C, Chapter 11 www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/airplane_handbook/12_afh_ch11.pdf Checked 2026-10-09.

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