�� FREE PREVIEW (First 5 Pages) ✔ First 5 pages free to download · No email required · Full document available after purchase This British Standard specifies tolerances on optical properties of mounted spectacle lenses. First published in February 1989, this is the second edition from November 1998. It was prepared under the direction of the Health and Environment Sector Board. The standard covers scope, normative references, definitions, classification, requirements, permanent marking of progressive power lenses, and test methods. Committees responsible include representatives from the Association of British Dispensing Opticians, British Medical Association, College of Optometrists, and more. The first five pages are available for free preview.
