Abstract: The present patent request refers to a utility model for an iris expansion ring which conjugates the functions of iris expansion and pupil dilation on patients that will be subjected to ophthalmic surgeries, and also permits implantation e withdrawal with a single incision. Handling of the present device spares accessory incisions to the ocular globe as well as the use of injector for its insertion, also displaying an alternated indents structure and low thickness that renders the whole implantation process easier.