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A comment on As Japan's population shrinks, bears and boars roam among schools and shrines. Parent comment

Re:As Japan's population shrinks, bears and boars roam among... by gwern on Monday July 11, 2016 @10:29PM (#12076339)
> Poor eyesight has no adaptive benefit. Yet many, many people need glasses.

Many people... in particular industrializing countries. Our genes have a great sharp eye focusing system. You won't find much myopia in a random tribe.

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