In Brief: How Glass Lenses are Made

By Norman Chan

All done in less than an hour.

Adam shared this awesome photo gallery documenting every step an Optician takes to make corrective lenses to fit custom glasses. Every step is described in captions, showing the transformation from a hockey puck-sized lens to something that fits in the customer's glasses. My favorite tool used is the "edger" a machine that takes a scan of the glasses bezel shape and cuts the glass to fit into that specific frame. I love that the whole process takes less than an hour, and even as quickly as 35 minutes, according to the technician who posted the photos. (And here's an old How It's Made video showing the manufacturing process for lenses, from raw slabs of glass.)