There is a lot of incorrect information that is spread online, and through social media posts anytime there is an upcoming solar eclipse. While a lot of the misinformation is about the eclipse itself, there is also poor advice on choosing the right glasses for a solar eclipse.
It is essential to understand that glasses for a solar eclipse are not the same as sunglasses. There are no sunglasses that are designed to meet the requirement for eye safety when viewing a solar eclipse. This is true for a total eclipse as well as a partial eclipse. The concern during the total eclipse is that people tend to wait too long until replacing the glasses, potentially creating a problem as the moon and sun come out of alignment.
Look for the Gold Standard
There are plastic as well as paper types of glasses for a solar eclipse. Both are both inexpensive and can be used as a souvenir of the event. The plastic glasses are more durable and are typically used over and over and are simply kept between solar eclipses.
All approved solar eclipse glasses are ISO 12312-2 compliant. This information should be provided on the glasses as well as on the company’s website. Do not use glasses that are not certified to meet this standard.
There are additional features to look for, as well. The glasses should be designed to filter out 100% of ultraviolet light. They should also filter out virtually 100%, which is 99.999% of visible light. In other words, holding these glasses or viewers to the eyes in a normal lighting condition, even outdoors, should provide almost no visibility. The only exception to this would be looking directly up at the sun or at a light bulb.
Top manufacturers also provide information on how to use the glasses during the eclipse. Always follow the manufacturer’s directions to ensure maximum protection for your eyesight.
