You’ve probably heard that all people with blue eyes are related ... way are known as structural colors.” There are two ...

There are different types and causes of heterochromia – and it can be very ... The general rule is that the less melanin a person has, the lighter their eyes,' says Wingate. So, blue eyes have small ...

Someone with central heterochromia has different colors within the same eye. Complete heterochromia is when they have two different colored eyes ... Some types of heterochromia are common in ...

There are different types of color blindness ... Humans have three types of light-sensing cones in the eyes: red, blue, and green. With color blindness, also known as color vision deficiency ...

"The main pigment in the eyes is melanin and it's the way that melanin is distributed that gives you the different eye colours," he says. "Simply classifying them: you've got blue eyes, some ...