What Does Z87 Mean On Safety Glasses

Complete Explanation

The marking Z87 on safety glasses signifies that the eyewear meets the requirements of the American National Standards Institute (ANSI) standard Z87.1, titled “Occupational and Educational Personal Eye and Face Protection Devices.” This standard establishes performance criteria for impact resistance, optical quality, and durability of protective eyewear used in workplaces such as factories, laboratories, and construction sites.

• ANSI Z87.1:
  A comprehensive standard that tests eyewear for resistance to impact from high-velocity particles, high-mass objects, and chemical splashes. It also evaluates lens clarity, side coverage, and frame strength.
• Z87 vs. Z87+:
  Glasses marked simply with “Z87” have passed basic impact tests. Those marked “Z87+” have met more stringent high-velocity impact requirements and are often required for tasks involving high-energy impacts (e.g., grinding, chipping).
• Application:
  The Z87 marking is most commonly found on prescription and non-prescription safety glasses sold in the United States and other countries that adopt ANSI standards. It is a key requirement under OSHA regulations for eye protection in hazardous environments.

History / Background

The ANSI Z87.1 standard was first adopted in 1968 in response to a rising number of workplace eye injuries. Prior to its introduction, there was no uniform national benchmark for safety eyewear, leading to inconsistent protection. The standard has undergone several revisions—most notably in 1989, 2003, 2010, and 2015—each time incorporating new testing methods and materials. The addition of the “+” high-impact rating appeared in the 2003 revision to address hazards from high-velocity particles. Today, ANSI Z87.1 remains the dominant eyewear safety standard in North America, often referenced by the Occupational Safety and Health Administration (OSHA) and other regulatory bodies.

Importance and Impact

The Z87 marking has significantly reduced workplace eye injuries by providing a clear, enforceable benchmark. Manufacturers must submit their products to independent testing to earn the mark, ensuring that even low-cost safety glasses meet a basic level of protection. The standard also influences international norms; many countries reference ANSI Z87.1 when the U.S. standard is adopted by multinational companies. In the medical, welding, and laboratory fields, Z87 compliance is often mandatory, directly impacting worker safety and reducing employer liability.

Why It Matters

For consumers and workers, understanding the Z87 mark helps in selecting the correct eyewear for specific risks. Glasses marked only Z87 are suitable for low-impact tasks (e.g., woodworking, inspection), while Z87+ glasses are necessary for grinding, metalworking, or any activity with flying fragments. Knowing the difference prevents under-protection and over-spending. Additionally, the mark assures the user that the eyewear has undergone standardized testing, a critical consideration when prescription safety glasses are required.

Common Misconceptions