"Adaptive Eyewear" is a fascinating program out of the UK. By injecting various amounts of fluid into the lenses of thick glasses, then removing the syringes on either side once the correct vision is achieved. That makes it possible to ship one set of glasses to thousands of people instead of trying to send out a variety of lenses to match all needs — not to mention allowing users to dial in their own prescription.
It sounds like the project has been around for several years. The company reports that thousands of pairs of glasses have been distributed by U.S. peacekeeping forces. Newer, lighter models are in the works. Fantastic stuff.