Pigmented Border of the Iris

The iris pigment border (also known as the iris pigment border) is the colored area around the pupil of the eye. This area contains large amounts of melanin, the pigment that gives color to the iris.

The pigment border is formed during the development of the embryo and remains throughout a person’s life. It protects the eye from excess light by regulating the amount of rays entering the eye. The darker the pigmentation of the border, the better it performs this function.

In people with dark iris color, the pigment border has a darker shade compared to the rest of the iris. In people with light eyes, the border may be almost invisible.

In some cases, the abnormal lack of pigmentation in this area can lead to various visual disturbances such as photophobia and nystagmus. Therefore, the presence of a pigment border around the pupil is important for the normal functioning of the eye.

The iris pigment border is the area of ​​the iris that is darker in color than the rest of the iris. It can come in different shapes and sizes, but usually has the shape of a ring around the pupil.

The pigment border of the iris plays an important role in determining eye color. It contains melanin, a pigment that is responsible for the color of the iris and skin. Melanin also affects the eye's light sensitivity and protects it from ultraviolet rays.

There are several reasons why the pigment border of the iris may become darker or lighter. For example, in people with dark eyes the pigment border may be darker than the rest of the iris, while in people with light eyes it may be lighter. Also, the color of the pigment border of the iris can change with age.

In addition, the pigment border of the iris can be changed in some diseases, such as retinitis pigmentosa. This disease causes the gradual destruction of the pigment layer of the iris, resulting in loss of pigment and changes in the color of the iris.

However, changes in the color of the pigment border of the iris are not always associated with diseases. Some people have a genetic predisposition to change the color of the pigment border, for example, if they have a family tree with people with darker or lighter eyes.

Overall, the pigment border of the iris is an important part of the eye and plays an important role in determining its color. Discoloration of the pigment border may be due to genetic factors, age or disease, but in most cases it is a natural process that does not require treatment.