Variable volume liquid lenses

A liquid lens comprising:

• a chamber having a volume;
• a first fluid contained in the chamber;
• a second fluid contained in the chamber;
• an interface disposed between the first fluid and the second fluid;
• one or more first electrodes insulated from the first fluid and the second fluid;
• and
• one or more second electrodes in electrical communication with the first fluid, wherein a position of the interface is based at least in part on a voltage applied between the first electrode and the second electrode;
• a window element comprising:
• a window configured to transmit light therethrough along an optical axis;
• an attachment portion coupled to an underlying structure of the liquid lens;
• a first recess on a first side of the window element;
• and
• a second recess on a second side of the window element, wherein material between the first recess and the second recess provides a flexure that extends between the window and the attachment portion, wherein the first recess and the second recess are offset from each other so that displacement of the window and flexure produces less peak tensile stress than peak compressive stress on the flexure.