04 August 2008
This is an truly impressive innovation -- Harry Potter-style glasses with expandable lenses attached to syringes full of oil. The user "inflates" or deflates the lens until the refractive index compensates for the user's visual defects.
The video above shows the process in 6 minutes, or you can read about it HERE and HERE.
I was immediately reminded of the non-electric refrigerator and the merry-go-round water pump. Low-tech, inexpensive solutions to common problems. Bravo to the developers.