How To Make Sure Your Solar Eclipse Glasses Are Legit
We’re just one week away from one of our solar system’s most breathtaking displays. If you wish to fully enjoy the majesty of the celestial spectacle, it’s important that you don a pair of safe and effective solar eclipse glasses.
All of North America is gearing up for the 2024 total solar eclipse, the first of its kind in almost seven years. Here’s how to ensure that your solar eclipse glasses are the real deal.
NOW: NASA and other agencies will discuss the plans for the 2024 total solar #eclipse on Monday, April 8. https://t.co/fulgjvXzUC
— NASA (@NASA) March 26, 2024
How NOT To View The Solar Eclipse
Eye safety is extremely critical during full or even partial eclipses. NASA has stressed the importance of wearing proper eyewear during the event, advising against the usage of regular sunglasses. While they do provide a darker tint, your run-of-the-mill shades are not equipped to provide any adequate protection from the sun’s intensity during the eclipse.
NASA also advises against viewing the sun through camera lenses, binoculars, or telescopes with special-purpose solar filters properly secured, as this can cause immediate eye injury.
Don’t Be Fooled By Shoddy Shades
According to the American Astronomical Society (AAS), it’s important to check the label on your pair of eclipse-viewing glasses. It used to be that any legit pair of glasses would be labeled with ISO 12312-2 compliance, which denoted proper filtering for direct viewing of the sun.
However, it’s come to light in recent years that some manufacturers would include the ISO label on sunglasses even if they hadn’t been properly inspected to comply with the necessary safety measures. How ironically shady, right?
In response to his revelation, the AAS instead recommends that you check their official list of safe viewer and filter suppliers to guarantee the quality of your glasses. NASA has no official endorsement of any particular brand, but that list should help you pick a safe, AAS approved pair of viewers.
Test Out Your Solar Eclipse Glasses Before The Eclipse
While there’s no way to tell whether your glasses are legit or not just by looking at them, there are easy ways for you to test out their effectiveness before the full solar eclipse next week. The AAS recommends putting them on indoors first. Ideally you shouldn’t be able to see anything through them except for the brightest of light sources in your home. Even then the lights should still be extremely faint through the filters.
If the shades work that well inside, then you should wear them outside on a sunny day and look around once more. The only light source that should be getting through from there is the sun’s rays reflecting off a shiny surface.
If the glasses continue to work from there, the third and final test is to, ever so briefly, look directly at the sun while wearing them. If the glasses are actually safe then you should be able to see the sun as a round disk.
If your solar eclipse glasses pass all three of these tests, then they are more than likely safe to use for the big day on April 8. As always with events like these, however, respect the sun’s power and understand the human eyeball’s limits when it comes to bright lights. Practice caution and only use certified, high-quality filters and viewers for the 2024 total solar eclipse!