French physicist Bruno Berge reprised research on a physical phenomena known as ‘electrowetting’, discovered at the turn of the 20th century. Berge realised the potential of this phenomena in deploying the technology as a lens. His invention employs two non-mixing liquids whose interface curves when exposed to electricity, thus changing the focus of the lens. The ‘liquid lens’ is now sold by the company he founded, Varioptic S.A.