Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like ...

But do blue-light glasses actually work? And what is blue light anyway? Blue light is one part of the visible light spectrum ...

When evolution skeptics want to attack Darwin's theory, they often point to the human eye. How could something so complex, they argue, have developed through random mutations and natural selection ...

The intricacy and seeming perfection of the eye, both as an object of anatomical beauty and as a working machine, have worried and intrigued scientists, philosophers and zealots, especially during ...

Human eyes are actually spheres ... and the cones see the colours: red, green and blue, and all the millions of shades in between. The rods and the cones send information about shapes and colours ...