A new advance is ultra-wideband (UWB) technology, which USES very high frequencies at very short range to transmit huge amounts of data, as in sending video from an iPod-like device to a TV screen.

The short range of the induction-loop antenna in the lens means the external antenna has to be very close to the eye: taped around the eye socket, in fact.

The practice indicates that this system is easy to control and use, and it works very stably and can realize short range wireless communication from one to many reliably.