Medically reviewed by Andrew Greenberg, MD Eye color genetics is complex, with multiple genes from each parent determining a ...

Hazel eyes are a mix of brown, gold, green ... hazel eyes are also not the most common eye color around. Blue-eyed folks may be rarer, but their eye color has a fascinating history.

Blue eyes are caused by a gene mutation. For years, researchers had searched for it on the OCA2 gene. The OCA2 gene determines how much brown pigment is in our eyes. But what they were looking for ...