Environmental indicators computed for a particular environment are converted into a transmittable data format each of the environmental indicators is computed by electronic environmental measurement device from among multiple diverse electronic environmental measurement devices. According to the method of manufacturing a porous metal electrode of the present invention, in the press process for controlling the thickness of dry-cast metal powder and rearranging the dry-cast metal powder, the microstructure of the porous metal electrode can be controlled, and the uniformity of the thickness of the porous metal electrode can also be controlled. The invention may be transparent for use during the day or in association with prescription or non-prescription lenses. In another embodiment, usage patterns are used for designing a middle layer and generating code.