Four axis casting fixture

As the popularity of plastic, as opposed to glass, spectacle lenses has grown, ways have been sought to form these products in more efficient ways. For example, lenses are known to be formed by casting a layer onto a preform, or wafer, so that subsequent machining and processing can be significantly reduced, if not totally avoided. The fixture of the invention provides a bottom portion into which a mold half is placed. Movably mounted above the bottom portion is a top portion having two horizontal plates adapted to slide relative to each other to control the X direction and Y direction and hold a preform or wafer. The top portion is further adapted to allow for the adjustment of the relative angle between the preform or wafer and mold half, as well as adjustment of the distance between the top portion and bottom portion.