A method to manufacture optics and optical subsystems. In one aspect, a method to manufacture an optical-element in accordance with the present disclosure comprise the steps of: Printing at least a part of a mold with an additive manufacturing printer. Optically figuring the mold to the specifications of the desired optical-element. Printing a nanocomposite-ink into the mold. Selectively, curing the nanocomposite-ink. Repeating at least the steps of deposition of the nanocomposite-ink and selective curing, until the mold is sufficiently filled and cured. Optionally, releasing the optical-element from the mold.