Several genetic markers contribute to our final eye color shade. A baby born with blue eyes can have brown eyes by their 1st birthday.

The science as to why is pretty cool. Nothing in the human eye is naturally blue, but people with no melanin in their iris have blue eyes – so where does it come from? Blue eye color is actually ...

Others believe people with green or blue eyes ... while no equivalent standard exists in the U.S. For all the fascination around keratopigmentation, it’s easy to forget what exactly is being altered.

The iris allows some of this ... remain clear to refract light, it has no blood vessels. Vitreous and aqueous fluid Two fluids circulate throughout the eyes to provide structure and nutrients.

His gaze softens as he draws closer to you. With one hand around your waist and the other cradling your jaw, he pulls you in. You look into his eyes ...

It's no surprise that you might do a doubletake ... interacts with the melanin and other pigments in the iris." For example, green eyes might appear more blue in certain lighting conditions ...