What is meaning of blue eyes?

Blue eyes are a genetic trait that is caused by a lack of melanin in the iris. Melanin is a pigment that gives color to the skin, hair, and eyes. People with blue eyes have less melanin in their iris, which causes the light to scatter and reflect off the iris, giving it a blue color. Blue eyes are more common in people of European descent, but can occur in any ethnic group. While blue eyes are often considered captivating and attractive, they can also be a risk factor for certain eye conditions, such as age-related macular degeneration and uveitis.