My father maintains that when he was a kid, more people had blue eyes. I know brown eyes are dominant, but can a noticeable change really occur in such a short period of time? Yes! In 1900, about 88 percent of the U.S. population was white (source: U.S. Census Bureau), and, according to a study at Loyola University, more than half of non-Hispanic white Americans born around that time had blue eyes. By midcentury, that had dropped to one baby in three. In 2010, the Census Bureau found it much more difficult to classify Americans by race or origin, but the author of the study estimated that fewer than one in six Americans now have blue eyes.
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