An original design, which uses photographic slides for "lenses." The point here is not to use the glasses as slide viewers, but to allow the general shade, hue and pattern of a slide determine the tint of your glasses.
Print each temple and the main body, along with two of the pins. These pins fit into the hinges on either end of the glasses.
I have included the SketchUp file, as it may be necessary to adjust the sizing of the glasses (I have a rather large head, and nose, and have tailored the sizing here to fit my noggin.)