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
What Is to Be Done? (novel) The "Dame in mourning" appearing at the end of the novel is Olga S. Chernyshevskaya, the author's wife. Characters with the last name "Kirsanov" also appear in Ivan Turgenev's "Fathers and Sons". Dostoyevsky argues with Chernyshevsky's ideas in "Notes from Underground". In particular, he responds negatively to Chernyshevsky's idealization of The Crystal Palace, a theme which is referenced throughout Russian literature. American playwright Tony Kushner referenced the book multiple times in his play "Slavs!". The main character of Gide's "Les caves du Vatican" (En. "Lafcadio's Adventures"), Lafcadio, resembles Rakhmetov. In the book "", author Chris Matthew Sciabarra claims that "What