ISO 12312-1 is an international standard that specifies the requirements for solar viewing glasses and filters. It ensures that these products provide adequate protection against harmful solar radiation, particularly during events like solar eclipses. The standard outlines the necessary optical properties and safety features to prevent eye damage. The standard is part of a broader effort to promote safe viewing practices during solar phenomena. By adhering to ISO 12312-1, manufacturers can ensure their products meet safety guidelines, helping consumers enjoy solar events without risking their eyesight.