It’s not unusual for blue-tinted rings to appear around your iris — the colored part of your eye. This condition is called corneal arcus. There may be a link between early onset corneal arcus (also ...

It is believed that there are four main factors, which determine iris colour: the pigment granules within the posterior pigment epithelium, the concentration of pigment within the iris stromal ...

You might be proud of your blue or green eyes, but their colour is simply a trick of the light, according to one expert. While eye colour seems to differ from person to person almost as much as a ...