mr. rogers explores automated optics production

This is neat

http://www.videosift.com/story.php?id=19751

I wonder how modern this is. I like the typical shop environment. As I understand it, places like LensCrafters keeps a ton of blanks on hand with curves cut into one side already.

Mike

The one-hour eye glass places have "blanks" which are
already ground, polished, and coated. They carry these blanks
in a matrix of standard diopters and astigmatism corrections.
When someone orders glasses, they merely select a blank and
cut down the edges to fit the frames.