An IOL injector cartridge, comprising an upper wall (100a), a lower wall (100b), the upper wall and the lower wall combining to define a lumen that extends from a proximal end to a distal end, a slot (110) extending through the entire thickness of the upper wall and extending from the proximal end and having a slot distal end formed by the upper wall, an edge of the upper wall that, at least partially defines the slot, having a convex curvature, the curvature occurring along the thickness of the edge.
