An intraocular lens configured to be implanted within a capsular bag of a patient's eye, the lens comprising: a fluid optic body comprising a cavity for containing an optical fluid, the cavity defined by: a sidewall extending around the cavity and defining a diameter of the cavity; a deformable optical membrane intersecting the sidewall around an anterior circumference of the sidewall and spanning the diameter of the cavity, the deformable optical membrane configured to extend across the optical axis of the patient's eye; and a posterior optic intersecting the sidewall around a posterior circumference of the sidewall; a second optic body spaced a distance apart from the fluid optic body and configured to extend across the optical axis of the patient's eye; and a plurality of struts extending from the sidewall and coupling the fluid optic body to the second optic body, the struts being configured such that axial compression of the capsular bag causes the plurality of struts to deform the sidewall in a manner that increases the diameter of the cavity such that a curvature of the deformable optical membrane is modified, wherein the intraocular lens is characterised in that: the posterior optic comprises a central protrusion extending anteriorly into the cavity; the deformable optical membrane comprises a ring-shaped protrusion extending posteriorly into a space between the sidewall and the central protrusion of the posterior optic; and contact between the ring-shaped protrusion of the deformable optical membrane and the central protrusion of the posterior optic defines a maximum modification to the curvature of the deformable optical membrane. a fluid optic body comprising a cavity for containing an optical fluid, the cavity defined by: a sidewall extending around the cavity and defining a diameter of the cavity; a deformable optical membrane intersecting the sidewall around an anterior circumference of the sidewall and spanning the diameter of the cavity, the deformable optical membrane configured to extend across the optical axis of the patient's eye; and a posterior optic intersecting the sidewall around a posterior circumference of the sidewall; a sidewall extending around the cavity and defining a diameter of the cavity; a deformable optical membrane intersecting the sidewall around an anterior circumference of the sidewall and spanning the diameter of the cavity, the deformable optical membrane configured to extend across the optical axis of the patient's eye; and a posterior optic intersecting the sidewall around a posterior circumference of the sidewall; a second optic body spaced a distance apart from the fluid optic body and configured to extend across the optical axis of the patient's eye; and a plurality of struts extending from the sidewall and coupling the fluid optic body to the second optic body, the struts being configured such that axial compression of the capsular bag causes the plurality of struts to deform the sidewall in a manner that increases the diameter of the cavity such that a curvature of the deformable optical membrane is modified, wherein the intraocular lens is characterised in that: the posterior optic comprises a central protrusion extending anteriorly into the cavity; the deformable optical membrane comprises a ring-shaped protrusion extending posteriorly into a space between the sidewall and the central protrusion of the posterior optic; and contact between the ring-shaped protrusion of the deformable optical membrane and the central protrusion of the posterior optic defines a maximum modification to the curvature of the deformable optical membrane. the posterior optic comprises a central protrusion extending anteriorly into the cavity; the deformable optical membrane comprises a ring-shaped protrusion extending posteriorly into a space between the sidewall and the central protrusion of the posterior optic; and contact between the ring-shaped protrusion of the deformable optical membrane and the central protrusion of the posterior optic defines a maximum modification to the curvature of the deformable optical membrane.