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This is a pair of glasses. The lenses are attached on the frame by small screws. I also upload the lenses as template.The base curve of the lenses is 6.
Update (18 Dec 2017)!
I updated the files. Now, there are hinges to assemble the temples to the frame. You can use filament (1.75mm) as a pin for the hinge. I leave the original stl files in case someone wants to use metallic hardware.