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 Bright Sun Brings It to Light The Bright Sun Brings It to Light "The Bright Sun Brings It to Light" is a German fairy tale collected by the Brothers Grimm in "Grimm's Fairy Tales", tale number 115. It is Aarne-Thompson type 960, The Sun Brings All to Light. A tailor's apprentice robs and murders a Jew on the road, despite the Jew saying that "The bright sun will bring it to light." He then settled down. One day, he saw the sunlight reflecting from his coffee and jeered about its bringing "it" to light. His wife bothered him until he told her what he meant. She