There are lots of ways to identify bodies eg from dental records or via fingerprints…or even the serial numbers on breast implants.
Today’s invention is another technique which involves the use of an especially fine contact lens -to be worn on the back of the eye.
As anyone who wears contacts knows, it’s possible to get a normal lens stuck in this position and, with a bit of calm manipulation, to retrieve it. Murder or disaster victims could be identified more easily if they wore such a device -which would only be easily accessible to the person when alive, or a surgeon when deceased.
These lenses might also be used by spies intent on transporting documents covertly, in miniaturised form.