Mandrel for holding a lens blank and method of making a lens using the same

A mandrel assembly for holding an intraocular lens blank, the mandrel assembly comprising:

• a mandrel comprising:
• a shank portion having a central axis, and
• a lens blank holding section configured to hold a lens blank, the lens blank holding section including a central cavity formed concentrically with the central axis of the shank portion, the central cavity comprising a surface upon which projections are formed;
• and
• a ring portion comprising an inner ledge;
• wherein the mandrel assembly is configured such that, when the intraocular lens blank is held by the lens blank holding section and the ring portion is received within the central cavity, the projections contact and support a first bottom surface of the lens blank at a fixed distance from the surface of the central cavity and the inner ledge contacts and holds a second top surface of the lens blank opposing the first bottom surface of the lens blank.