Do safety glasses block UV? Usually yes, and the clear ones do it too

The direct answer

Yes, with a qualification worth understanding. The lens material used in essentially every pair of safety glasses on this site is polycarbonate, and polycarbonate absorbs ultraviolet as a property of the material rather than as a feature someone added. That is why so many safety glasses carry a UV claim without charging extra for it, and why that claim holds in clear lenses as well as dark ones.

The qualification: "blocks UV" is a claim, not a test result, and the specific wording differs between makers. Wiley X states 100% UVA/UVB. Edge says its lenses block 99.9% of UVA, UVB and UVC. The retailer for 3M's SecureFit 400 states that the polycarbonate lens absorbs 99.9% UV. NoCry states UV380 on one product and UV400 on another. And Pyramex's Intruder page says UV protection with no percentage at all, which is exactly why that cell in our tables is a dash rather than a number.

Tint has nothing to do with it

This is the misconception the whole page exists to correct. Darkness is a visible-light property; ultraviolet is invisible. A lens can be jet black and transmit UV, or water clear and block it almost completely. The two are set by different things — the tint by a dye or coating that absorbs visible wavelengths, the UV performance by the material and its UV additive.

For this site's reader there are two consequences. A clear range lens is not a UV compromise, so you can shoot an outdoor match in clear lenses without giving anything up on ultraviolet. And a dark lens with no published UV statement is the one combination we would not buy — not because dark is inherently worse, but because you are being sold the visible half of the job with nothing stated about the invisible half. The general tint-by-light reasoning is on the lens color guide, and how dark a given tint actually is on safety glasses tint levels.

What the published claims mean

Four wordings cover almost everything you will see.

UV400. The lens filters ultraviolet up to 400 nanometres — the top of the UV band, where visible light starts. This is the most complete of the common claims and the one used by NoCry on the OverSpecs+ and by Global Vision across its range.

UV380. Filtering to 380 nm, which leaves a sliver of the longest-wavelength UVA above it. NoCry uses this on the EyeArmor+. It is a meaningful claim, just a slightly narrower one than UV400, and we quote whichever the maker states rather than rounding them together.

99% or 99.9% UVA/UVB. The most common industrial wording — used by 3M's retailer, DEWALT, Howard Leight and Radians. It covers the two UV bands that reach the ground in sunlight.

100% UVA/UVB, or UVA/B/C. Wiley X and ESS state 100% UVA/UVB; Edge and Revision extend the claim to UVC; the retailer for Pyramex's Ever-Lite states 99% UVA/B/C. UVC does not reach the ground from the sun in meaningful amounts, so on a range the UVC part matters mainly around artificial sources such as welding arcs — which need a proper welding filter regardless.

What the makers in our registry publish

Each claim is quoted from the source linked on that product's page. Note the last row: a maker stating "UV protection" without a figure is common, and we do not convert it into a number.

The U marking on the frame

ANSI Z87.1 has a marking for this, and it is the one piece of independent evidence available on the frame itself. A UV filter lens carries a U followed by a scale number — U2 through U6 — with U6 the highest step. If your lens is marked U6, the filter performance was assessed as part of the device's conformity to the standard rather than asserted in marketing copy.

In practice most general-purpose safety lenses are not marked with a U code at all, because the U scale is used for filter lenses specifically. The absence of a U mark is therefore not evidence of poor UV performance — it usually just means the lens is a clear or lightly tinted impact lens rather than a filter. The complete marking decoder, including the L, W, R, D and X codes, is on what does Z87+ mean.

Three pairs that publish a UV claim

How to check a pair you already own

Read the maker's page, not the retail listing. Retail copy routinely adds UV claims the manufacturer does not make. Search the model name on the maker's own site and look for the words UV400, UVA/UVB or a percentage.

Check the frame for a U code. If there is one, it tells you the filter was assessed under the standard. If there is not, you are relying on the maker's statement — which is normal for impact lenses.

Treat an unmarked, unbranded dark lens as unknown. If nobody will state a figure, do not assume one. For a pair that spends its life outdoors it is worth buying a frame that publishes the claim; the rated options that also work as sunglasses are on best safety sunglasses, and the polarized field on best polarized safety glasses.

One thing you cannot do at home is measure it. UV transmission is a laboratory measurement, and the handheld testers sold for the purpose are not something we can vouch for. This page quotes what makers publish; that is as far as the evidence goes, and further than most listings get.