Eye colour is determined by the amount of melanin, a pigment, in the iris. Brown eyes, the most common colour, result from high melanin levels, while lighter shades like blue and green occur due ...

Iris photography is a stunning and unusual art form, that captures close-up images of the eye's iris, highlighting the intricate and unique beauty of every individual’s eyes and then turning ...

Iris color may not stay constant throughout a person’s life. For example, many babies are born with blue eyes that darken within the first 3 years of life. This change occurs as melanin develops.

The iris is “what we recognize as the colored part of the eye,” explained Dr. Nicholas P. Bell, a professor of ophthalmology and visual science with McGovern Medical School at UTHealth in Houston.