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
Look at What the Light Did Now earthy, quirky additions". "Look at What the Light Did Now" won the 'DVD of the Year' prize at the 2012 Juno Awards in Canada, and was nominated for the Sound & Vision Award at CPH:DOX in Denmark. Feature Length Documentary Music videos Live Performances from The Reminder Tour 2007-2009 Tracks 9-12: Chilly Gonzales Original Score - Songs from The Reminder improvised and performed on solo piano. Total running time: 58:43 Look at What the Light Did Now Look at What the Light Did Now is a documentary/live album DVD/CD by Canadian indie pop artist Feist, first released in December 2010.