What Is ISO 12312-2 Certification? The Safety Standard Behind Eclipse Glasses

SEO Title
What Is ISO 12312-2 Certification? The Safety Standard Behind Eclipse Glasses

Meta Description
Learn what ISO 12312-2 certification means for solar eclipse glasses and why it is essential for safe viewing of the August 12, 2026 solar eclipse in Europe.

Excerpt
ISO 12312-2 certification is the international safety standard for solar eclipse glasses. Learn why it matters and how to ensure your eclipse viewers are safe for the August 12, 2026 eclipse.

Why Solar Eclipse Glasses Need a Safety Standard

Looking directly at the Sun without protection can cause serious eye damage known as solar retinopathy. Even when the Moon partially covers the Sun during an eclipse, the remaining sunlight is still powerful enough to injure the retina.

For this reason, scientists and safety organizations recommend using certified solar eclipse glasses whenever viewing a partial solar eclipse.

According to guidance from the NASA, only specially designed solar viewing filters can safely block the intense radiation emitted by the Sun.

This is where ISO 12312-2 certification becomes essential.

What Does ISO 12312-2 Mean?

ISO 12312-2 is an international safety standard that defines the requirements for filters used to observe the Sun directly.

The standard ensures that solar viewing glasses:

• block extremely bright visible sunlight

• filter harmful ultraviolet radiation

• reduce dangerous infrared radiation

• allow safe viewing of solar events like eclipses

The standard is issued by the International Organization for Standardization, the global organization responsible for developing technical safety standards used worldwide.

If eclipse glasses meet ISO 12312-2, they have been designed to protect your eyes when looking at the Sun.

How to Identify ISO-Certified Eclipse Glasses

Before using eclipse glasses, check that they clearly display the following information:

ISO 12312-2

along with the manufacturer’s name and contact information.

Legitimate solar eclipse glasses should also include usage instructions and warnings about safe viewing.

If the glasses do not contain this information, they should not be used for solar observation.

Why Certification Matters for the 2026 Solar Eclipse

On August 12, 2026, a total solar eclipse will be visible across parts of the North Atlantic and Europe, including regions of Spain and western France.

Millions of people are expected to watch the event, and demand for eclipse glasses will increase significantly as the date approaches.

Using properly certified eclipse glasses ensures that observers can safely experience every phase of the eclipse.

For more guidance on verifying eclipse glasses before using them, read our guide on how to know if solar eclipse glasses are safe.

Can You Ever Look at the Eclipse Without Glasses?

Yes — but only during the brief phase known as totality, when the Moon completely covers the Sun.

During this short moment, it becomes safe to remove eclipse glasses and observe the Sun’s outer atmosphere, called the solar corona.

However, the instant sunlight begins to reappear, eclipse glasses must be worn again.

Scientists at the European Space Agency emphasize that outside the period of totality, proper eye protection is always required when viewing the Sun.

Preparing for the August 12, 2026 Eclipse

Whether you plan to watch the eclipse from Spain, France, the United Kingdom, or elsewhere in Europe, the most important step is ensuring you have proper eye protection.

Certified eclipse glasses allow viewers to safely watch the entire progression of the eclipse — from the moment the Moon begins covering the Sun to the dramatic return of sunlight afterward.

To learn more about safe eclipse viewing and the conservation mission behind the event, visit:

👉 https://www.finwhaleeclipse.eu

The Fin Whale Eclipse Project

The Fin Whale Eclipse Project connects the wonder of the 2026 solar eclipse with ocean conservation.

A portion of proceeds from eclipse glasses helps support initiatives that protect the North Atlantic fin whale, one of the largest animals on Earth.

By linking astronomy with environmental awareness, the project hopes to inspire people across Europe to appreciate both the sky above and the oceans below.