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 Light That Failed hardback "Standard edition" by MacMillan with a prefatory note that stated: "... "The Light That Failed" as it was originally conceived by the Writer." It is believed that Kipling's mother had pressed release the happy ending which Kipling later regretted, leading to the note in the "Standard edition" of the novel. "The Light That Failed" was poorly received by critics. Jad Adams calls the novel richly revealing even though it was badly reviewed, especially its man-loving and misogynistic undercurrents. He calls it "... a metaphor for the failing gallantry of 19th-century man confronting the new woman." Andrew Lycett, in his