Medically reviewed by Johnstone M. Kim, MD Key Takeaways Gray and green eye colors are the rarest in the world.Eye color is ...

The mesmerizing colors of human eyes—from deep browns to vibrant blues, subtle greens, and rare ambers—result from intricate genetic factors that influence melanin production in the iris. This same ...

Cat eyes have always held a special fascination. Their gaze is mysterious, expressive, and often reveals more about mood or health than one might think. But it’s not just the shape of their eyes ...