ShiftCam - #DidYouknow - How Lenses Are Made. Optical lenses go through a lot of processing steps before they are placed into a spectacle frame! In short, 102 steps + 60 days =
How ophthalmic lenses are made | Tokai Optical Co.,Ltd.| 東海光学株式会社
Lens - Wikipedia
Electric contact lenses zoom in and out with the blink of an eye