TLC’s OutDaughtered Season 9 gives fans an update on Hazel Busby’s eyes.Hazel has nystagmus, a condition that causes her eyes to make repetitive, uncontrolled back-and-forth movements. When ...

Hazel eyes are a mixture of green and brown, but can also contain amber or gold hues. Green. Around 2% of the world’s population have green eyes, making them very rare overall.

According to Healthline, 45% of Americans have brown eyes, 27% have blue eyes, 18% have hazel eyes and 9% have green eyes. That means there are tens of millions of blue-eyed people in the U.S. alone.