Iris sphincter muscle Iris sphincter muscle The iris sphincter muscle (pupillary sphincter, pupillary constrictor, circular muscle of iris, circular fibers) is a muscle in the part of the eye called the iris. It encircles the pupil of the iris, appropriate to its function as a constrictor of the pupil. It is found in vertebrates and some cephalopods. Initially, all the myocytes are of the smooth muscle type but, later in life, most cells are of the striated muscle type. Its dimensions are about 0.75 mm wide by 0.15 mm thick. In humans, it functions to constrict the pupil in bright light (pupillary light
The Wind That Shakes the Barley (film) raise families side by side. Insulted, Damien responds by saying that he will never "sell out" the Republic the way Chris Reilly did and Teddy leaves the cell in tears. Damien writes a goodbye letter to Sinéad, expressing his love for her, and quote his brother's words "It's easy to know what you're against, quite another to know what you're for". But he says that he knows what he stands for and is not afraid to die for it and tells Sinéad to look after Teddy. At dawn, Damien dies before a firing squad commanded by a heartbroken yet obstinate