The minor arterial circle of iris, also known as the pupillary circle, is a small circular structure found in the iris of the eye. This structure is made up of small blood vessels that supply the iris with oxygen and nutrients. The minor arterial circle of iris can also be referred to as the pupillary anastomosis, or the iris arterial circle. It is an important component of the eye that helps regulate the size of the pupil and maintain proper blood flow to the iris. Without the minor arterial circle of iris, the iris would be unable to function properly, leading to vision problems and other complications.