ISO 12312-2 is an international standard that specifies the safety requirements for solar viewing glasses and filters. It ensures that these products effectively protect users from harmful solar radiation during events like solar eclipses. The standard outlines testing methods to verify the optical quality and safety of these glasses. The standard is part of a broader set of guidelines aimed at promoting safe solar observation. By adhering to ISO 12312-2, manufacturers can provide reliable products that help prevent eye damage while allowing people to enjoy celestial events safely.