A device for forming a fluid lens when immersed in a liquid medium. The device includes a semipermeable transparent sheath defining a fully enclosed cavity and having a plurality of pores for permitting a liquid to flow into the cavity, and a hydrophilic polymer array disposed in the cavity, presenting...http://www.google.fr/patents/US4709996?utm_source=gb-gplus-shareBrevet US4709996 - Fluid lens
