Researchers from Korea's Ulsan National Institute of Science and Technology (UNIST) managed to embed a LED inside a regular soft contact lens, using transparent and conductive electrodes made from graphene and silver nanowires. This is the first time an electronic device was embedded inside a contact lens using flexible and transparent materials.

The researchers final goal is to develop wearable computer displays inside contact lenses. Basically it will be like a Google Glass HMD, but without any external display components. Obviously that goal is still far in the future: currently they manged to embed just one LED and not a full display.

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