Variable-focus lenses have been tried before, but not autofocus. A friend had a manually controlled pair from Superfocus and loved them. But Superfocus is no longer selling them. http://www.allaboutvision.com/... The mechanisms used may differ, but the function is similar. What's new here is the autofocus feature - look at a scene, and a sensor will measure the distance and use that information to focus the lens as your visual system would do if your organic lens still had its depth adaptation capability. That's cool and potentially useful. They claim 5.8 diopter focusing range, good enough to go from distance to reading. But their prototype lens is 8.4 mm (1/3 inch) thick and weighs 14.4 gm. So there's a way to go yet.