Unlike more common eye colors like brown, which is the dominant color and makes up about 80% of the world's population, or blue and green, gray eyes require a confluence of complex genetic ...

This eye color is a variation of blue eyes and is extremely rare. It's estimated that less than 1% of the world population has gray eyes. If you have gray eyes, your personality traits may vary ...

Medically reviewed by Christine L. Larsen, MD Photophobia is an abnormal sensitivity to light. It is associated with dry eye disease, migraines (severe, recurrent headaches), and traumatic brain ...

Today, only 10 percent of the global population has blue eyes, with the highest concentration found in Northern Europe. Gray eyes are a less common eye color. While they may look similar to blue ...

Breeding male: blue-gray above, including most of head and back. Crown has a black line at the forecrown that extends along the sides of crown; white eye ring contrasts with gray face. Wings ...