Clip-on frames for RealD 3D glasses.
For those of us with glasses, trying to wear a second set of glasses to watch 3D movies can be annoying.
As a solution, pop out the lenses, and mount them in this clip-on frame, which can clip onto your regular glasses. (Slight modification may be needed for your glasses)
Place lenses in glasses_bottom. Lenses are indexed, so they can't go in backwards or on the wrong eye.
Glue glasses_top into place to seal the lenses in.
Attach glasses_hook (printed twice) into the small slots in glasses_top.