Melanin in our eyes can only produce brown pigments. The iris of the eyes doesn’t contain green and blue colors.

Nevertheless, our eyes can obtain different colors.

Brown: People with a high content of melanin in the iris tend to have brown eyes.
Blue: Eyes with less melanin (lighter eyes) absorb less light. Collagen fibers in the eye scatter light and it reflects off the environment. Most of the blue light gets back out, causing the eyes to appear blue.
Green: Sometimes a small amount of melanin causes the production of yellow pigment. When it is combined with the reflected blue color, the eyes look green.
Red: The eyes of people with albinism look red. This is because their body either produces very little melanin or none at all. Their eyes may appear red because light first reflects off blood vessels at the back of the retina.

People with light eyes may be more sensitive to light because they have less pigment that protects the eyes from bright light.

Some people have specks or spots of darker or lighter color in their eyes. This is absolutely normal because our eyes are unique. Sometimes the pupil of the iris has one color, and it’s different closer to the edge. This happens if different parts of the iris contain different amounts of pigment.

Comments to article «Why We Are Born With Blue Eyes and Then They Change Colors»