Genetics are a big part of it, like you would expect, but its a bit more nuanced than what we learned in high school biology.

Studies have suggested that the contrast between the white of human eyes - known as the sclerae - and the colourful irises allows others to detect the direction of our gaze. The ability to detect gaze ...

The human eye functions like an exceptionally precise, high-end camera, one with a resolution of around 576 megapixels. What makes it intriguing is that although our eyes can focus on light at only ...

Brown is the most common eye color worldwide by a large majority. In contrast, green is one of the rarest eye colors worldwide. The color of the eyes depends on how much melanin the eyes contain.