of tissue fluid components through the artificial iris fig3 8 and the accompanying descriptions deal with the method of production of the first embodiment of the artificial iris through the use of polymer processing and irradiation techniques to this end fig3 8 depict the first embodiment of the artificial iris in intermediate forms at progressive stages in the production process fig9 10 and the accompanying text then describe the artificial iris of the second embodiment of the invention which features a partially reflective iris and the method of production of this embodiment through the use of laser irradiation intermediate forms and stages of the first embodiment of the artificial iris that also occur in the second embodiment are cited accordingly the initial procedure in the production process of all embodiments of the invention is the formation of a polymer film of the desired thickness on a suitable substrate this is accomplished using established techniques of spin coating the selected polymer from solution as are described for instance by wolf and tauber in the context of photoresists for microelectronics processing the polymer is cast onto the substrate to a nominal thickness of 7 15 microns a thickness greater than that of the finished artificial iris t in fig2 is required because the.