The Ophthalmologist's Time Machine 39 - Takeaways - MDSpire

The Ophthalmologist's Time Machine 39

Did carrots save Britain by giving pilots superhuman night vision?

  • By

  • Stephen G. Schwartz

  • Christopher T. Leffler

  • Andrzej Grzybowski

  • June 5, 2026

  • 3 min

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  • 1

    The British government promoted carrot consumption during WWII to address blackout blindness amid food rationing.

  • 2

    John Cunningham, a British pilot, was nicknamed 'Cat’s Eyes' for his night vision, attributed to eating carrots.

  • 3

    Carrots contain beta-carotene, which converts to vitamin A, but their bioavailability is low compared to other sources.

  • 4

    Vitamin A deficiency can lead to xerophthalmia, causing night blindness and other eye diseases.

  • 5

    Some historians suggest the carrot story was a ruse to conceal the use of radar technology for night operations.

Original Source(s)

The Ophthalmologist's Time Machine 39

  • by Stephen G. Schwartz, Christopher T. Leffler, Andrzej Grzybowski

  • June 5, 2026

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