Machines for use in the design, cutting, drilling, grinding and finishing of optical lenses, namely, edgers for optical lenses; blockers for optical lenses; tracers for use in finishing optical lenses; combined blockers and tracers for optical lenses; combined edgers and tracers for optical lenses; rimless designers for optical lenses; drills for optical lenses; [ groovers for optical lenses; polishers for optical lenses; lens tinting machines for use in the optometric field; ultrasonic clean...