3D glasses

I've never watched many 3D movies. As a lifetime glasses wearer, adding a pair of cardboard glasses is challenging. They never seem to line up correctly with my frames. When I decided I wanted to try drawing red-blue 3D images, I knew I needed a better way to do the glasses. So I made my own clip-on glasses out of some plastic packaging and sharpie.

I consider these 3D glasses Mark 1. Proof of concept though there's room for improvement.