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The Z87+(plano lens) and Z87-2+(Rx lens) markings on safety glasses and goggles indicate that eyewear is compliant with ANSI Z87.1 High Impact and ANSI/ISEA Z87.1 industrial safety standard for eye protection. Safety eyewear meeting these criteria are used in a variety of industrial and personal applications.
Tinted safety glasses also are marked with a V if they are photochromic lenses, and an S if they are considered special purpose tinted lenses. Other markings on special-purpose tinted safety glasses include: Lens marking of Impact Rated safety lens manufactured by 3M. (Image: 3M) Welding: W and shade number.