Imagine a pair of glasses that will work for anyone. Twist a dial on the side, and the lens becomes less or more powerful, depending on how bad your eyes are. That's the promise of Adlens' adaptive-lens eyeglasses.
How they work: The lenses are hollow, with a plastic sheet stretched across it on the inside. When you twist the dial, fluid pumps in between the sheet and the lens. The fluid is clear and has a high refractive index. The more fluid that pumps in, the more the curvature of the sheet increases, making the lens more powerful.
Adlens markets these glasses for the developing world since things like opthamologists and opticians can be scarce there, but they could be useful in developed countries as well. For instance: younger people whose eyes may worsen rapidly (I speak from experience) could just get one pair of these babies, negating the need to replace prescription lenses often. I mean, as long as you could tone down that dial (maybe replace it with a slider) and make the specs look at least a little more stylin'.
Source:
Adlens, via Wanderlust
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