Intraocular lens with improved shape retention

An intraocular lens comprising:

• a membrane defining a central chamber for containing an optical fluid and, when filled, to provide vision correction when implanted in a patient's eye, the central chamber having an optical axis extending through a vision-correcting optical zone of the central chamber and a peripheral region at least partially surrounding the optical zone;
• a membrane defining at least one peripheral chamber at least partially surrounding the central chamber along the peripheral region thereof and outside the optical zone, the peripheral chamber being in fluid communication with the central chamber;
• and
• associated with the at least one peripheral chamber, a shape-retention member for resisting collapse of the associated peripheral chamber in response to external force.