...NASA also suggests checking that the glasses you use aren’t damaged and that they’re compliant with the ISO 12312-2 international safety standard.

Earlier this week Time reported that Amazon sent out a warning to its customers to ensure that their glasses aren’t fake. The online retailer said in a statement that it discovered companies selling fake eclipse glasses on it website and will be offering refunds to those who bought them. Sellers will now have to provide verification documents before being allowed to sell such glasses on the site. ...