In order to finish a lens, what is required?

• A. Frame, lenses, blocks, adhesive 'leap pads'.
• B. Frame and lens only.
• C. Lenses and frame only.
• D. Lenses, frame, and polishing cloth.

Answer: (A)

Finishing a lens requires securing the lens to a blocking system so it can be accurately edged to fit the frame. The frame provides the final size and fit target, the lens is the actual material being shaped, and the blocking blocks attached with adhesive hold the lens rigidly during grinding and edging. Without the blocking setup, the lens cannot be correctly mounted or centered for finishing. The polishing cloth isn’t essential to the mechanical finishing process, though it’s handy for cleaning afterward. Thus, frame, lenses, blocks, and adhesive to attach the blocks are needed.