(Image credit: Live Science) A second lookīut even though you should probably replace your current glasses for eclipse viewing in 2024, that doesn't mean you should just throw out the ones you have. For this reason, APO - which has produced eclipse glasses for 25 years - includes a printed recommendation on its glasses to use them for no more than three years.Įclipse glasses by American Paper Optics are printed with a recommendation to discard the glasses after three years.
HOW TO SEE THE ECLIPSE WITH OUT GLASSES. ISO
"If someone calls me in six years and says, 'Are my glasses still good?' I'm not going to say, 'Send me a picture of your glasses.' I'd say, 'Buy new glasses,' under all conditions, every single time," Jerit said.Ĭompliance with ISO certification requires manufacturers to include an obsolescence date alongside the official ISO logo, Jerit told Live Science. "You can't control how people are going to store them," he explained.
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Over time, normal wear as well as environmental factors can make the lenses in paper eclipse glasses more prone to tearing or coming loose, meaning they may not adequately protect your eyes, John Jerit, president of American Paper Optics (APO) - one of the leading manufacturers of ISO 12312-2-compliant eclipse glasses - told Live Science.Īnd it's impossible to say for sure how well an individual pair of paper glasses is going to hold up over seven years, he added.
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Punctures, scrapes and scratches that might allow light to leak through the lenses render eclipse glasses unsafe, according to the AAS.