Quick Summary: ANSI Z87.1 is the governing U.S. safety standard for occupational eye and face protection. OSHA requires employers to provide eye protection that meets ANSI Z87.1 when workers are exposed to impact, chemical, dust, or optical radiation hazards. This guide explains Z87 vs Z87+, markings, testing requirements, compliance responsibilities, and how to select the correct safety glasses for different work environments.
Why Eye Protection Standards Matter in the Workplace
Eye injuries remain one of the most common and preventable workplace injuries across construction, manufacturing, healthcare, laboratories, and logistics environments. Flying debris, chemical splashes, dust, radiant energy, and blunt-force impacts can permanently damage vision if proper protection is not used. Safety glasses that merely look protective are not sufficient. OSHA requires verified performance standards to ensure real protection.
What Is ANSI Z87.1?
ANSI Z87.1 is a performance-based safety standard developed by the American National Standards Institute. It establishes minimum design, testing, and performance criteria for eye and face protection devices used in occupational settings. The standard applies to safety glasses, goggles, face shields, welding helmets, and laser protection eyewear.
ANSI Z87.1 is updated periodically to reflect new materials, testing methods, and workplace hazards. The most recent revisions emphasize impact resistance, optical clarity, coverage area, and durability.
Does OSHA Require ANSI Z87.1?
OSHA does not publish its own detailed eyewear performance standard. Instead, OSHA references ANSI Z87.1 as the accepted benchmark under 29 CFR 1910.133. Employers must ensure that eye and face protection used in the workplace meets ANSI Z87.1 or provides equivalent protection.
During OSHA inspections, compliance officers routinely verify that safety glasses and goggles are marked as ANSI Z87.1 compliant. Lack of proper markings may result in citations even if the eyewear appears robust.
Z87 vs Z87+: Understanding Impact Ratings
Z87 – Basic Impact Protection
Z87-rated safety glasses meet minimum impact resistance requirements. These lenses are tested using a small steel ball dropped from a specified height. Z87 eyewear is suitable for low-impact environments such as laboratories, inspection rooms, and light assembly work.
Z87+ – High Impact Protection
Z87+ eyewear undergoes significantly more aggressive testing, including high-velocity and high-mass impact tests. Z87+ safety glasses are required in environments with grinding, cutting, machining, construction, or flying debris hazards.
ANSI Z87.1 Markings Explained
ANSI requires specific permanent markings on frames and lenses to indicate compliance and protection type:
- Z87 – Basic impact protection
- Z87+ – High impact protection
- U followed by number – Ultraviolet protection level
- R – Infrared protection
- L – Visible light filter (welding)
- D – Splash and droplet protection
Markings must remain legible throughout the service life of the eyewear.
Prescription and OTG Safety Glasses
Prescription safety glasses must meet the same ANSI Z87.1 requirements as non-prescription models. Over-the-glasses (OTG) safety eyewear is designed to fit over standard prescription glasses while still providing compliant protection.
When to Replace ANSI Z87.1 Safety Glasses
Safety glasses should be replaced when lenses become scratched, cloudy, cracked, or when frames no longer fit securely. Any eyewear involved in a high-impact incident should be replaced immediately, even if no visible damage is present.
People Also Ask
What does ANSI Z87.1 mean?
It means the eyewear meets tested safety requirements for occupational eye protection.
Are Z87 glasses OSHA approved?
OSHA recognizes ANSI Z87.1-compliant eyewear as acceptable protection.
What is the difference between Z87 and Z87+?
Z87+ provides higher impact resistance.
Do safety glasses expire?
They do not expire but must be replaced when damaged.
Are sunglasses ANSI Z87.1 compliant?
Only if permanently marked as Z87 or Z87+.
Author
Mick Chan is a safety supplies industry professional with over 15 years of experience specializing in OSHA compliance, PPE regulations, and bulk safety product procurement across California.