"visible light communication (VLC) LED-based lamp to send a message to the human brain using the eye retina as a relay node. In fact, the eye and the brain can be seen as a natural VLC receiver"
"Fundamentals of Molecular Nano-Communication Networks" , 5G, Intra-body Nano Network, LED Street Lights, Internet Of Bodies, Internet Of Nano-Things.... - Prof. Ian F. Akyildiz (DARPA)