Mydriasis iris sphincter, composed of circularly arranged muscle fibers, and the iris dilator, composed of radially arranged muscle fibers. The sphincter is innervated by (signaled by nerves of) the parasympathetic nervous system, and the dilator by the sympathetic nervous system. Sympathetic stimulation of the adrenergic receptors causes the contraction of the radial muscle and subsequent dilation of the pupil. Conversely, parasympathetic stimulation causes contraction of the circular muscle and constriction of the pupil. The mechanism of mydriasis depends on the agent being used. It usually involves either a disruption of the parasympathetic nerve supply to the eye (which normally constricts the
What Is a Man Without a Moustache? What Is a Man Without a Moustache? What Is a Man Without a Moustache? () is a 2005 Croatian romantic comedy-drama film. Hrvoje Hribar directed the film and wrote the screenplay as an adaptation of Ante Tomić's 2000 novel of the same name. Starring Leon Lučev and Zrinka Cvitešić and set against a background of a country still recovering from the Croatian War of Independence, the film tells the story of a young widow who falls in love with a local priest and a difficult choice that the priest faces when being forced to choose between the woman and his