An accommodating intraocular lens (AIOL) (10) characterised by a first member (1) and a second member (3) arranged to correspond to anterior and posterior portions of a capsular bag, having an anterior-posterior axis passing centrally through the first and second members (1, 3), the first and second members (1, 3) being connected by one or more link members (2), a lens structure (4) including an inflatable lens (21), and a reservoir (23) of filling fluid (12) in fluid communication with the inflatable lens (21) through one or more channels (22), wherein axial movement of one of the first and second members (1, 3) along the anterior-posterior axis applies a pumping force to cause the filling fluid (12) to flow between the reservoir (23) and the inflatable lens (21).
