A litttle known trait of beauty and youth is a dramatic limbal ring
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https://www.today.com/style/what-are-limbal-rings-should-you-care-theyre-aging-t6686
What are limbal rings and should you care that they're aging?
"Psychologists say we unconsciously judge how attractive or young someone is based on the size and shade of their limbal rings."
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Frank Sinatra was known for his eyes