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That’s right – every single person blessed with those mesmerizing azure orbs shares a common genetic mutation that “turned off” the ability to produce brown pigment in the iris. This ancient switch has left blue-eyed folks with some surprising advantages…and disadvantages.

One of the most well-known quirks of blue eyes is an increased sensitivity to light. While those with darker irises have more melanin to protect the delicate tissues at the back of the eye, blue-eyed individuals lack this natural shield.