New British Standards

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This standard, titled Ophthalmic optics – Spectacle lenses – Uncut finished spectacle lenses: Part 3 – transmittance specifications and test methods, has been significantly revised. Although this is still titled uncut finished spectacle lenses since this is the generic name for this series of five standards, the scope has, however, been enlarged to include mounted lenses. It covers lenses that are dyed in the prescription house or optical practice and not just photochromic lenses or those lenses tinted by the major manufacturers. The scope also specifically mentions the purpose of attenuating solar radiation.