ANSI Z87.1 Defined
The American National Standards Institute (ANSI) is a nonprofit organization with a primary mission to:
Enhance both the global competitiveness of U.S. business and the U.S. quality of life by promoting and facilitating voluntary consensus standards and conformity assessment systems and safeguarding their integrity.
In other words, ANSI creates uniform testing standards and guidelines for a variety of products and equipment used by businesses in nearly every sector.
The Z87.1 portion of ANSI standards references the standards for Occupational and Educational Personal Eye and Face Protection Devices. These standards help ensure that personal eye and face protection devices provide the necessary protection from impact, non-ionizing radiation, and liquid splash exposures.
ANSI Z87.1 General Requirements
The ANSI Z87.1 certification provides a system organized based on encountered hazards. With this standard, the choice of safety eyewear revolves around what best represents the protection needed for the specific hazards encountered in the workplace. The most common hazards are:
- Blunt impact
- Splashes and droplets
- Small particles
Most safety eyewear manufacturers provide packaging and product information indicating how products meet ANSI Z87.1 standards. Also allowed under the standard are prescription safety lenses if they meet high-impact testing requirements.
ANSI Z87.1 2020 Update
Past updates to the ANSI Z87.1 standard have focused on product performance and harmonizing with International Safety Equipment (ISEA) standards. They’ve made it easier for users to select the appropriate safety gear based on the potential hazards and complications their environment produces. The 2015 update also clearly defined UV radiation and addressed issues related to emerging technologies.
The Z87.1 2020 update also addresses product innovations and continues ANSI’s focus on product performance as well as on harmonizing with ISEA standards. Since the 2015 update, the ANSI/ISEA Z87.1-2020 standards underwent the following changes:
- Criteria and requisite markings for protectors now offer relaxed optics as an option.
- Testing, performance, and marking criteria for anti-fog lenses were added.
- Transmittance allowances were changed.
- Welding filter shades were expanded.
- Clarifications were added to promote consistency in testing for dark-state tolerances for automatic darkening welding filters and determining the minimum coverage-age area with respect to the specified headform.
For more information on past revisions, see ANSI Z87.1 Eye and Face Protection Devices Standard. For the full 2020 update, read the complete ANSI-ISEA Z87.1-2020 Standard.
ANSI Z87.1 Testing Processes
ANSI Z87.1 certified safety glasses undergo intensive testing to ensure they’ll protect eyes as expected. Tests include:
- Basic and high-impact for lenses and frames.
- Exposure to non-ionizing radiation and chemicals.
- Durability to flammables and corrosion.
Edge Eyewear gives An Inside Look at Testing for High Impact Compliance to help understand impact testing processes. After seeing how badly non-safety-rated eyewear fails these basic tests, you’ll want to purchase only ANSI-Z87.1 rated eyewear.
ANSI Z87.1 Product Markings
The ANSI Z87.1 standard requires efficient and easy-to-understand lens and frame markings. These markings, listed below, make the selection process more straightforward and increase compliance.
- Z87+ is a high-velocity impact rating
- Z87 alone is the basic impact rating
- D3 indicates splash and droplet protection
- D4 indicates protection from dust particles
- D5 indicates protection from fine dust
- W plus a shade number shows the level of welding protection
- U plus a scale number shows the level of UV protection
- R plus a scale number shows the level of infrared light protection
- L plus a scale number shows the visible light filter
- Z87-2 on the front of the frame and on both temples indicates prescription eyewear
- H indicates a product designed for smaller head sizes
- V indicates photochromic lenses
- S indicates a special lens tint
Rx Spectacle Ratings
- Manufacturer’s mark or logo on frame or lens
- + symbol on lenses indicates they’re impact rated
- Z87-2+ on the frame.
- Z87+ on detachable side shields if equipped
Prescription frames also require size markings on frames and temples, and all safety markings for ANSI Z87.1-2020 safety eyewear must be permanently and clearly marked on frames or lenses. This marking requirement includes goggles and face shields as well as safety glasses.
Product Marking Example
The image above shows a pair of Bolle Safety Glasses with ANSI Z87.1-2020 product marking requirements.
- Z87+ indicates eyewear meets the high-velocity impact requirement.
- U6 means the eyewear has a UV rating of 6, the highest rating
- S indicates a special lens tint because these glasses feature Bolle’s ESP lens
You may encounter safety eyewear with only Z87 or the manufacturer’s mark with a + stamped on the lens or frame. These products were produced before or just after the 2010 standard and are still safe to use. They still meet ANSI Z87.1 high-velocity impact safety standards, but they don’t have updated product marking requirements.
Eye protection is serious business. Workers in almost every industry are exposed to hazardous conditions able to cause serious eye injury daily. The proper safety eyewear based on the current ANSI Z87.1-2020 safety standards and combined with 100% compliance to a mandatory eye protection program helps ensure workers across the globe are protected.