… material; lenses (including contact lenses), prisms, mirrors and other optical elements, of any material, …
Explanatory notes
… material; lenses (including contact lenses), prisms, mirrors and other optical elements, of any material, … shape required (i.e., with the necessary curvature, at the correct angle, etc.), and the polishing of these surfaces. … or multi‑focal. They also include contact lenses . (4) Mirrors constituting optical elements . These are used, for …