The IRIS zone refers to the area of the eye that contains the iris, the colored part of the eye that surrounds the pupil. This zone is responsible for controlling the amount of light that enters the eye, thus regulating the size of the pupil. It is also a crucial part of the eye for determining eye color and can provide important information about a person’s overall health. The IRIS zone is named after the Greek goddess Iris, who was believed to be the messenger of the gods and the personification of the rainbow, symbolizing the many colors and complexities of the iris.