Medically reviewed by Christine L. Larsen, MD Photophobia is an abnormal sensitivity to light. It is associated with dry eye ...

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

New research shows that all blue-eyed people share a common ancestor. This person lived more than 6,000 years ago and carried a genetic mutation that has now spread across the world. The exact ...

While not the rarest, hazel eyes are also not the most common eye color around. Blue-eyed folks may be rarer, but their eye color has a fascinating history. All blue-eyed people can trace their ...

The eyes of a Cuban rock iguana, a gargoyle gecko, a blue-eyed black lemur, a southern ground hornbill, a red-eyed tree frog, a domestic goat, a western lowland gorilla, and a human This story ...