Abstract: A single castable ophthalmic lens polishing lap includes a mounting plate that is adapted for connection to a lap press/cylinder machine and includes a flexible membrane that is affixed to the mounting plate and filled with castable material. A polishing pad is affixed to the flexible membrane. The lap is cast by first applying energy to the castable material that causes it to soften, and to preferably change to a fluid phase, and then pressing the lap against the rough cut back surface of a lens. This causes the castable material to deform so that the lap's curvature is complementary to the lens' prescription curvature. Energy is then removed from the lap so that the castable material solidifies in the desired shape. After polishing, the lap can be recast with another lens having a different prescription.

Abstract: A variable speed elecric motor (74) drives a crank (78) which in turn pushes a push arm (82) against a pivotally mounted drive lever (58), for swinging it through a drive stroke, and then retracting the push arm (82) to allow a spring (72) to return the drive lever (58) through a return stoke. The spring (72) moves the drive lever (58) towards a guide member (92) which is adjustable in position for changing the amplitude of the stroke. The moving end of the drive lever (58) is attached to a drive bar (48) which in turn is attached to and drives a plurality of pin assemblies (44) which serve to locate and drive oscillating members (114) which contact one surface of a lens (116). The opposite surface of the lens (116) is in contact with rotating tool (112) supported on a variable speed spindle (10). The lens (116) is attached to one of the tools (112, 114) and a polishing compound is located between the lens (116) and a surface of the other tool.