Innovation
Photos: Cold War ZX Spectrum clones spawned behind the Iron Curtain
These inventions can improve the lives of those in developing regions of the world.
Adspecs are oil-filled vision correction eyeglasses that can be adjusted by changing how much oil is in the lens. The inventor, Joshua Silver, says the glasses cost between $5 to $10 dollars, but hopes to get it around a dollar.
Credit: U.S. Department of Defense
Caption by: Tuan Nguyen
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