The underlying invention is directed to a method for changing the human perceptual color appearance of the iris (4) of a human's or animal's eye (1) by selectively decreasing the density of pigments of the anterior stroma layer (8) of the iris (4), the method comprising the steps of generating a plurality of predefined energy quantities (14)； applying one or more of the predefined energy quantities (14) to the anterior stroma layer (8), wherein each of the predefined energy quantities (14) is generated and applied such that it ablates at least in part melanocytes (15) of the stroma (6), wherein the predefined energy quantities (14) at least in part are generated and applied in such a way that ablated tissue (16) generated as an immediate cause of the energy quantities is discharged into the anterior eye chamber (9) such that the discharged tissue (16) can be removed by maintaining a mechanically generated flow (17) of rinsing solution through or within the anterior eye chamber (9).
