Scientists from the University of California, San Diego, have created a new robotic soft contact lens that lets you zoom by blinking twice. The lens can be controlled by your eye movements.  Eye movements like blinking carry change potential to signal. Shengqiang Cai, the lead researcher, told the New Scientist that the eye has an electro-oculographic potential, even if you’re sleeping: Even if your eye cannot see anything, many people can still move their eyeball and generate this electro-oculographic signal.  So, these scientists measured the electrical impulse and found a way to use it to change the focal length of the lens. The study…

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