New research shows that all blue-eyed people share a common ancestor. This person lived more than 6,000 years ago and carried a genetic mutation that has now spread across the world. The exact ...

Thus, it's possible that blue-eyed people ended up having more of a competitive edge in this geographical area as blue eyes were rarer. As they explain in the paper, “The rare-colour advantage ...

The iris is made up of two layers. For almost everyone - even people with blue eyes - the back layer (called the pigment ...

Medically reviewed by Christine L. Larsen, MD Photophobia is an abnormal sensitivity to light. It is associated with dry eye ...

This trait is particularly prevalent in some European populations, where up to three out of four people may have blue eyes. The reason behind the persistence of such colored eyes alongside darkly ...