How to Spot Fake Eclipse Glasses: A Step-by-Step Verification Guide
What to check before the 2026 European eclipse — from a manufacturer who has been testing this standard for 25 years.
The August 12, 2026 total solar eclipse will cross Spain, Iceland, and the Mediterranean. In the weeks before it, online marketplaces across Europe will fill with eclipse glasses from sellers who appeared recently and will disappear just as quickly. Many of those glasses will carry the ISO 12312-2 marking. A significant number will have never been tested to that standard.
This is not speculation. It happened in the United States ahead of the 2024 total solar eclipse, and it will happen in Europe in 2026. The pattern is consistent: eclipse demand spikes, pop-up sellers appear, fake documentation circulates, and a wave of eye injury reports follows.
Here is how to check whether the glasses you have — or plan to buy — are the real thing.
Why Counterfeiting Is a Problem Specific to Eclipse Glasses
Eclipse glasses occupy an unusual position in the consumer market. They are purchased infrequently, often by people who have no prior experience with the product, in the days or weeks before a specific event. That combination — unfamiliarity, urgency, and a defined deadline — creates ideal conditions for counterfeit sellers.
A counterfeit eclipse glasses seller does not need repeat customers. They need to capture a portion of a one-time demand spike, collect payment, and be gone before the consequences of their product reach anyone who could cause them trouble. The glasses that hurt people during the 2024 US eclipse were bought from sellers on major platforms who had no history in the category and left no trace afterward.
The ISO 12312-2 marking itself costs nothing to print on a pair of cardboard frames. A label that says "ISO 12312-2" is not evidence of testing. It is evidence that someone printed it. The verification steps below are how you get past the label to the actual compliance record underneath.
Red Flags: Six Things That Should Make You Stop
Before getting into the verification process, these six conditions should prompt serious skepticism about any eclipse glasses product. If you see multiple red flags together, do not proceed.
|
Red Flag |
Why It Matters |
|
Price too good to be true (under €1/pair) |
Legitimate eclipse glasses cannot be manufactured, certified, and sold at rock-bottom prices. If the math does not work, the certification almost certainly does not either. |
|
"ISO Certified" or "ISO Approved" claim |
ISO does not certify or approve individual products. These phrases indicate either a misunderstanding of the standard or a deliberate attempt to mislead buyers. The correct language is "complies with ISO 12312-2." |
|
No manufacturer name and verifiable address |
ISO 12312-2 requires clear manufacturer identification on the product. If you cannot identify who made it and where, you cannot verify any compliance claim. |
|
Certificate with mismatched details |
Test report dates in the future, product names that do not match the glasses in your hand, or lab names you cannot find registered anywhere — these are all indicators of fabricated documentation. |
|
No Notified Body number on CE marking (EU) |
In the EU, CE marking without a four-digit Notified Body number (e.g. CE 0527) is incomplete. A bare CE mark — with no number — does not demonstrate PPE Category 2 compliance. |
|
Generic marketplace seller with no track record |
A seller who appeared two months before the eclipse and will disappear two weeks after it has no meaningful accountability. If something goes wrong, there is no one to return to. |
The Five-Step Verification Process
If you want to verify that a pair of eclipse glasses genuinely meets ISO 12312-2, here is the process. These steps apply whether you are buying new glasses or checking a pair you already have.
Step 1: Find the manufacturer name and address
ISO 12312-2 requires that the manufacturer's name and verifiable address appear on the product or packaging. This is not optional and it is not a technicality — it is the mechanism that ties a product to its testing record. Without a real manufacturer behind it, there is no compliance to verify.
What you are looking for: a company name and a physical address, not a website URL, not a P.O. box. If the glasses say "Manufactured for [Retailer]" without naming the actual manufacturer, that is insufficient. You need to know who made them.
Step 2: Look for a test report reference
A genuine ISO 12312-2 compliant product will have been tested by an accredited independent laboratory. That testing produces a test report with a specific report number, a date, and the name of the laboratory that conducted the tests. This information should be accessible — manufacturers who have done the work properly are not reluctant to share it.
What you are looking for: a test report number or a way to obtain the test report (manufacturer website, direct contact, documentation included with the product). If none of this exists, the testing may not have happened.
Step 3: Verify the laboratory is ILAC MRA accredited
The testing laboratory must be accredited under the ILAC Mutual Recognition Arrangement (ILAC MRA) — an international framework that ensures labs operate to consistent standards of competence and impartiality. A test report from a non-accredited laboratory is not valid confirmation of ISO 12312-2 compliance, regardless of what it states.
You can check whether a specific laboratory holds ILAC MRA accreditation by searching the ILAC database at ilac.org. You are looking for two things: that the lab is listed, and that ISO 12312-2 is within its scope of accreditation. A lab accredited for general optical testing but not specifically for ISO 12312-2 is not sufficient.
Step 4: Confirm the test report covers the product you have
A test report applies to the specific product configuration that was submitted for testing. If a seller has a valid test report for one design of glasses and sells a different design under the same brand name, the report does not cover what you bought.
In the EU this matters even more. Under PPE Regulation 2016/425, every change to the product design — including artwork changes — requires a new certification assessment. A test certificate for one version of a product is not automatically transferable to a modified version, even if the optical filter is identical. Ask specifically whether the product you are buying is covered by the certification on file.
Step 5: Check for CE marking with a Notified Body number (EU buyers)
If you are buying eclipse glasses for use in Europe, CE marking is a legal requirement, not a quality indicator. But CE marking alone is not sufficient — it must be accompanied by a four-digit Notified Body number (for example, CE 0527 or CE 0197). This number identifies the independent certification body that assessed the product under PPE Regulation 2016/425.
A bare CE mark with no number indicates incomplete certification or a mark that has been applied without proper authorization. You can look up Notified Bodies using the European Commission's NANDO database (nando.nonli.eu). Search for the number on your glasses to confirm the Notified Body exists and is authorized for the PPE directive.
The Physical Test: What You Should See
There is one simple physical check you can do with any eclipse glasses before using them under the sun. Hold them up to an ordinary indoor light — a ceiling light or lamp — and look through the lenses.
Through ISO 12312-2 compliant eclipse glasses, an indoor light should be essentially invisible. You might see a faint orange or red tint, but the light itself should be almost completely blocked. If you can see the light clearly, or if you can make out objects in the room around you, the filter is not dark enough.
This test is not a substitute for the verification steps above — a filter can pass this visual check while still failing on infrared transmittance or uniformity, neither of which your eyes can detect. But it will catch the most severely non-compliant products immediately.
When you point compliant eclipse glasses at the sun during an eclipse, you should see only the solar disc — a comfortable, orange-tinted circle — and nothing else. If you can see stars, landscape, or any ambient light around the sun, the filter is too light and should not be used.
A Note on Already-Have Glasses
A common question before every eclipse: can I reuse the glasses from last time? The answer is yes, provided two conditions are met. First, the glasses genuinely met ISO 12312-2 when they were new — not all glasses from past eclipses did, and the standard has been updated since 2015. Second, the glasses are not damaged. Scratches, wrinkles, pinholes, or deformation of the filter material are all reasons to replace them.
Ignore warnings that say eclipse glasses expire after three years. Modern ISO 12312-2 compliant eclipse glasses — specifically those using black polymer solar filter material — do not degrade with time under normal storage conditions. The caution around older glasses was relevant when aluminized Mylar was more common; that material is more susceptible to degradation. Current polymer filters are stable.
If your glasses are from the 2024 US eclipse and you verified them at the time, store them flat, away from heat and humidity, and they will be ready for 2026.
Trusted Sources for 2026
The straightforward solution to the counterfeit problem is to buy from manufacturers who have done the testing, hold the certification, and have been in this industry long enough to have a track record you can check. For the 2026 European eclipse, that means looking for CE-marked glasses from manufacturers with full EN ISO 12312-2:2022 certification — not just ISO 12312-2, but the EU harmonized version with the Notified Body assessment behind it.
Lunt Solar Systems eclipse glasses have been tested to the full standard, carry CE certification under PPE Regulation 2016/425, and are the #1 best-selling eclipse glasses on Amazon worldwide. They are available directly through Amazon across Europe.
For a full explanation of what the EU certification requirements mean for buyers, see our follow-up article: Eclipse Glasses and CE Marking: What European Buyers Need to Know →
For the complete technical breakdown of what ISO 12312-2 requires and tests, see: What Is ISO 12312-2? The Standard That Makes Eclipse Glasses Safe →
Buy CE-Certified Eclipse Glasses in Your Country
|
Buy CE-Certified Eclipse Glasses in Your Country ISO 12312-2 compliant | CE marked | Ships locally |
|||||
|
|||||
|
|||||
|
Lunt eclipse glasses are CE certified under EN ISO 12312-2:2022 | #1 best-selling eclipse glasses on Amazon worldwide |
Andy Lunt is the founder of Lunt Solar Systems, a precision solar telescope and eclipse glasses manufacturer based in Tucson, Arizona, with over 25 years of experience in solar optics. Lunt eclipse glasses are CE certified under EN ISO 12312-2:2022 and are the #1 best-selling eclipse glasses on Amazon worldwide.