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contactlens.jpgthe ultimate visualization device: contact lenses capable of dynamically changing color depending on the blood glucose level, giving users a real-time impression of their health. tiny sensor spots are placed around the contact lens, monitoring glucose, as well as sodium, cholesterol & potassium. in the near future, the lens will be capable of changing fluorescence & even color, ranging from green to yellow to orange to red, enabling the wearer (or an observer) to determine a broad range of blood sugar levels, from too low to too high. [newscientist.com]