Iris dilator muscle "musculus dilator pupillae", The "Nomina Anatomica" as authorized in 1895 in Basle and in 1935 in Jena used the full Latin expression. Iris dilator muscle The iris dilator muscle (pupil dilator muscle, pupillary dilator, radial muscle of iris, radiating fibers), is a smooth muscle of the eye, running radially in the iris and therefore fit as a dilator. The pupillary dilator consists of a spokelike arrangement of modified contractile cells called myoepithelial cells. These cells are stimulated by the sympathetic nervous system. When stimulated, the cells contract, widening the pupil and allowing for more light to pass through the eye.
The Light That Failed silent film by Pathé, with Robert Edeson and Jose Collins, a 1923 silent film by Famous Players-Lasky, and a 1939 film by Paramount, starring Ronald Colman as Heldar, with Muriel Angelus, Ida Lupino, and Walter Huston. The Light That Failed The Light That Failed is a novel by the Nobel Prize-winning English author Rudyard Kipling that was first published in "Lippincott's Monthly Magazine" dated January 1891. Most of the novel is set in London, but many important events throughout the story occur in Sudan and Port Said. It follows the life of Dick Heldar, an artist and painter who goes