Taken from a NextDoor Post.
Are Your Solar Eclipse Glasses Safe?
A solar eclipse will be visible across the continental United States on Monday, August 21. Many people will be hosting parties, going to the beach, and planning camping trips to view this rare occurrence.
If you are planning to view the solar eclipse, do so safely with eclipse glasses and solar viewers that meet the international safety standard. Consider products marked with ISO 12312-2, which means they meet the international safety standard.
Find more information on choosing safe glasses from the Federal Trade Commission and follow these tips:
Use new glasses or viewers – Do not use glasses more than three years old, wrinkled, or scratched.
Follow the instructions on your glasses or viewer carefully.
Do not use homemade filters or ordinary sunglasses.
Do not look at the uneclipsed or partially eclipsed sun through an unfiltered camera, telescope, binoculars, or other optical device – even when using your eclipse glasses or viewer. Those optical devices concentrate the solar rays, which will damage your eclipse glasses or viewer, and seriously injure your eyes.
For more solar eclipse safety information, including how to protect your eyes from the dangerously bright sun, visit eclipse2017.nasa.gov.