What method describes the rectangular box formed by both horizontal and vertical measurements on a lens?

The boxing system is the method used to describe the rectangular box formed by both horizontal and vertical measurements on a lens. This system allows for a standardized way to communicate lens dimensions, which is especially important in the fitting and fabrication processes in optics.

In the boxing system, the lens is depicted as being contained within a rectangle, where the horizontal measurement reflects the distance from the nasal edge to the temporal edge of the lens, and the vertical measurement indicates the height of the lens. This representation aids dispensing opticians in accurately identifying and calculating various parameters for lens cutting and fitting into a frame, ensuring they meet the specific requirements of the patient's prescription.

The other options, while they may relate to different aspects of optics or measurements, do not accurately define the standardized method focused on the dimensional framework that the boxing system provides for lens measurement.