Blue eyes are blue for the same reason that water and the sky are blue: they aren't blue in and of themselves, but rather, they scatter light so that only blue light reflects out.
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People with dark eyes are apparently more agreeable, while people with blue eyes tend to be more competitive.
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Blue-eyed people have higher alcohol tolerance.
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Blue eyes has a special kind of deepness — There are no depths more pitch black than blue eyes. A blue iris is a well-brink that scoops out the murk of its darkness below.
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Blue eyes is all the more penetrating as they seem flat, just as the sea abyss is all the deeper when its surface is smooth, and just as quicksand with mounds has never been attested to in human history.
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Having both red hair and blue eyes is the rarest combination in humans.
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Reindeer eyes turn blue in the winter.
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