British Standards and European Standards
British Standards are safety standards for a wide range of products, processes and services. They are drawn up by the British Standards Institution (BSI), which is an independent national body. The BSI is the UK member of the International Organisation for Standardisation (ISO) and of the Comité Européen de Normalisation (CEN). CEN Standards take precedence over national standards in the European Union. Where a British Standard is superseded by a CEN Standard, it may retain the same number for continuity. The Standard could have two or more numbers. I.e. BS, EN, ISO or if there is no National Standard, BSI may use a prefixed EN number.
Standards have been issued covering a range of subjects relevant to optometry and dispensing optics including the following: contact lenses, display screen equipment, instruments (e.g. trial case lenses and test charts), lasers (e.g. in relation to personal eye protection), lens materials, lighting for buildings, magnifiers, personal protective equipment (e.g. personal eye protection), quality systems, spectacle frames, spectacle lenses, spectacles (complete), sunglasses and surface swimming goggles.
Standards are available through local libraries, or directly from the BSI or British Standards Online. British Standards are also available free of charge to members of the College of Optometrists through its library service.