Fig. 1From: A liquid progressive multifocal lens adjusted by the deformation of a non-uniform elastic membrane due to the variation of liquid pressureScheme of a liquid-filled progressive multifocal lens: a schematic exploded diagram of the lens, b the cross-sectional view of schematic structure, c the cross-sectional view before injecting liquid and (d) the cross-sectional view after injecting liquidBack to article page