NASA has new release "What to do with your Solar Eclipse Glasses". At the bottom you'll find mailing address to send your glasses to Astronomers without Borders. You can see the full story:
https://www.nasa.gov/feature/what-to-do-with-your-solar-eclipse-glasses Now that the Aug. 21 total solar eclipse across America is over, you may be wondering: Can I reuse or recycle my eclipse glasses?If your glasses aren’t damaged, you can use them again for future solar eclipses. As long as your eclipse glasses or viewers are compliant with the ISO 12312-2 safety standard and the filters are not scratched, punctured, torn, or coming loose from their frames, you may reuse them indefinitely. And you don’t have to wait for a partial or total eclipse.
“As long as they’re in pristine condition, safe solar viewing tools can be used any time to continue our newfound relationship with the Sun,” said Thomas Zurbuchen, associate administrator of NASA’s Science Mission Directorate at Headquarters in Washington. “You don’t have to put them in a drawer until the next solar eclipses in America in 2023 and 2024.”
Some glasses and viewers are printed with warnings stating that you shouldn't look through them for more than three minutes at a time and that you should discard them if they are more than one to three years old. Rick Fienberg of the American Astronomical Society (AAS) said, “These warnings are outdated and do not apply to eclipse viewers compliant with the ISO 12312-2 standard adopted in 2015.”
To ensure your eclipse glasses are from a supplier of ISO-compliant products, see the AAS’s
Reputable Vendors of Solar Filters & Viewers page.
If you’d still like to part with your eclipse glasses -- or if you have more than one pair -- you can donate them to children in regions experiencing future eclipses. The group
Astronomers Without Borders, which provides astronomy-related education and equipment for developing countries, has announced a partnership with telescope company Explore Scientific to collect and distribute used eclipse glasses.
Carefully pack your glasses and mail them to: AWB Eclipse Glasses Donation Program, Explore Scientific, 1010 S. 48th St., Springdale, AR 72762.