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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.
A: In the United States, we have a government agency called OSHA that makes and enforces workplace safety rules and regulations. OSHA requires safety glasses in environments where eyes are at risk. Safety glasses consist of a safety frame and safety lenses. A safety frame is sturdier than most dress frames and not easily bent or broken. Some have side shields, and some don't, depending on your specific job.