Contact lens

Muscles that control eye movement have an electrical output—or more precisely, an electro-oculographic signal.  With that in mind, engineers at the University of California at San Diego designed a contract lens from polymers with five imbedded electrodes.  As a wearer blinks twice, the electrical impulse alters the shape of the lens changing the depth of field.  In effect, this is a contact lens that can “zoom in.”  MORE

Image Credit:  pxhere.com