ANSI Z87.1, CSA Z94.3, markings engraved on the temples: behind these acronyms lies a single objective—protecting workers’ eyes. Yet, in practice, the growing number of standards often creates more confusion than clarity.
On one side, the American standard. On the other, the Canadian standard. While both share the same goal, they do not carry the same weight in the eyes of provincial regulators and workplace safety authorities. For health and safety managers and procurement professionals, understanding which standard takes precedence can help avoid costly compliance mistakes.
In this article, we break down the differences between ANSI Z87.1 and CSA Z94.3 to help you navigate the requirements and choose safety eyewear that is truly compliant.
ANSI Z87.1 and CSA Z94.3: Two Standards, Two Jurisdictions
ANSI Z87.1 and CSA Z94.3 govern the same category of equipment: eye and face protection. Both establish requirements for impact resistance, protection against flying particles, optical radiation, and chemical splashes. Their goal is the same: to reduce the risk of eye injuries. However, their application differs depending on the country.
ANSI Z87.1: The U.S. Standard
ANSI Z87.1 is the benchmark standard in the United States. Published by the American National Standards Institute (ANSI), it sets the requirements for eye protection in the U.S. market. Because many safety products sold in Canada are manufactured by American companies, ANSI markings are commonly found on imported products and equipment sold online.
CSA Z94.3: The Standard Recognized in Canada
In Canada, CSA Z94.3 is the governing standard. Developed by the CSA Group, it establishes the design, performance, and use requirements for workplace eye protectors while aligning with the Canadian regulatory framework.
Although both standards share the same objective, their testing methods differ in several areas, including impact energy requirements, protector classifications, and marking requirements. As a result, a product may comply with one standard without fully meeting the requirements of the other. ANSI certification alone does not automatically guarantee compliance with CSA Z94.3.
Key takeaway: the question is not which standard is better, but which standard is recognized in the jurisdiction where your employees work.
Which Standard Is Recognized in Quebec?
In Quebec, the Regulation Respecting Occupational Health and Safety (ROHS) governs the use of eye protection and references the CSA Z94.3 standard. As a result, CSA Z94.3 forms the basis of compliance recognized by the CNESST and is part of an employer’s obligations regarding workplace eye protection.
Safety glasses certified only to ANSI Z87.1 are not considered compliant by the CNESST. This does not mean the product is of poor quality, nor does it mean that ANSI is a less rigorous standard. The American standard is well established and reliable, but on its own, it is not sufficient to demonstrate compliance in a Canadian workplace.
This is a distinction many buyers overlook. A product advertised as “ANSI Z87.1 certified” on an online store may be perfectly suitable for the U.S. market while failing to meet Quebec’s requirements. During an inspection, the absence of a CSA Z94.3 designation can therefore become a compliance issue.
The consequences go beyond paperwork. Using unrecognized protective equipment can weaken your position during an inspection, complicate matters following a workplace accident, and potentially require you to replace an entire batch of safety eyewear that has already been purchased.
Dual CSA/ANSI Certification: A Simple and Compliant Solution
The solution is simpler than it may seem: choose safety glasses that are dual certified to CSA and ANSI standards. When a product carries both certifications, it complies with both the Canadian and American standards. As a result, it meets the requirements recognized by the CNESST.
This dual certification is now common among leading manufacturers. Many models designed for the North American market comply with both standards and clearly display both certifications. You do not have to sacrifice selection, style, or comfort to remain compliant.
The benefits also extend beyond regulatory compliance. By building your safety eyewear program around CSA/ANSI-certified products, you can ensure that every pair purchased meets the same standard. The result is fewer case-by-case verifications, a lower risk of errors, and fewer unpleasant surprises during an audit.
The key takeaway is simple: before making a purchase, verify that the CSA Z94.3 designation appears on the product—not just ANSI Z87.1. In Quebec, ANSI certification alone is not sufficient; CSA certification, or dual CSA/ANSI certification, is.
How to Read Compliance Markings on Protective Eyewear
The compliance of a pair of safety glasses can be verified directly on the frame. Protective eyewear typically features markings engraved on the temples or around the lens—one of the key characteristics of compliant safety glasses. These markings are your first verification tool, even before reviewing a technical specification sheet.
For a quick assessment, look for the following:
- CSA logo or CSA Z94.3 designation → Recognized Canadian standard
- Z87 or Z87+ → ANSI certification (useful, but not sufficient on its own in Quebec)
- Manufacturer’s initials → Product traceability
- Application codes (impact, liquids, dust, radiation) → Indicates suitability for specific workplace hazards
The presence of the CSA Z94.3 designation, or the CSA logo, confirms that the product complies with the Canadian standard recognized by the CNESST. If you see only the markings Z87 or Z87+, the product is certified to the ANSI standard only.
The markings also provide information about the manufacturer and the level of protection offered. Depending on the codes displayed, you can determine whether the eyewear is designed to withstand impacts, protect against liquid splashes, limit exposure to dust, or filter certain types of radiation.
When in doubt, do not take chances. An illegible, incomplete, or ambiguous marking should be treated as a warning sign. Ask the supplier to provide documentation confirming CSA Z94.3 certification before making a purchase.
Turning Compliance Into a Habit
Checking the marking pair by pair works on a small scale. Across multiple sites and hundreds of employees, manual control becomes a risk: one off-catalogue purchase, one supplier who changes a model, and non-compliance slips in unnoticed.
True control comes upstream, in choosing what is offered. When every available product is validated in advance, compliance no longer rests on each person’s vigilance. It is built into the program.
This is the approach LookSecure builds with its partners. Our catalogue of compliant protective eyewear] offers only models compliant with CSA Z94.3 , most of them dual-certified CSA/ANSI. Your employees choose from approved options, your buyers order without checking each marking, and your documentation stays audit-ready.
The question “ANSI or CSA?” no longer comes up with every order. It is settled at the source, across all your sites, in a program designed for compliance and cost control.
FAQ: ANSI Z87.1 and CSA Z94.3
No, not on their own. Canadian regulators such as the CNESST rely on the Canadian CSA Z94.3 standard. ANSI certification alone is not enough to demonstrate compliance, even if the product is high quality.
Check the marking engraved on the temple or lens. The CSA Z94.3 mention or the CSA logo confirms Canadian recognition. When in doubt, ask the supplier for the certification documentation.
It indicates the standard met, the manufacturer and the type of protection. The codes following the standard specify the uses: impacts, splashes, dust or radiation. It's the first thing to read before any purchase.
Provincial OHS frameworks point to CSA Z94.3 as the reference for eye protectors. It is therefore the standard to prioritize to ensure your equipment is compliant in the workplace.
Yes. A product carrying both markings meets the Canadian and the American standard. It is compliant with Canadian regulatory requirements.
Looking for a Safety Eyewear Program That Meets Compliance Requirements?
Multiple standards, one goal: protecting your employees’ vision with the right equipment. In Canada, CSA Z94.3 remains the recognized standard, while dual CSA/ANSI certification helps simplify purchasing without limiting choice.
Before placing your next order, take a few seconds to check the markings. Better yet, rely on a program that has already done the verification for you.