Wired contact lenses

The Economist had an article a while back about contact lenses with micro, flexible electronics on them. These aren't visual sensors, but, instead, are placed on the eye surface and can monitor diseases and control drug dosages. Its just another example of how curved, flexible and small electronics enable interesting applications. But if you've read your science fiction then you might suspect that its only a small step before these devices get optical elements. These could enhance vision in wavelengths beyond our visual range, by adding sensors with special filters. Or they could manipulate and augment the incoming visual field using LCDs or LCoS or DMDs. The advantage of having it on the eye would be that the tough brain-electronics interface problem would be avoided. Instead of that interface (which is still current research) the electronics would communicate to the brain by manipulating light, before it falls on the retina.