by Dr Dan Waniek, MD
Copyright © 2006 danwaniek.org
The obvious function of the iris is to provide an optical diaphragm for the system that produces images on the central part of the retina.
Interestingly, the morphology of the iridial stroma and epithelia seem to support more than the necessities of a highly aperture-adjustable structure. Its crypts and chromatic accidents offer a variable and complicated pattern of densities and transparencies that have stimulated several studies, both scientific and empirical.