Oakley has always been committed to delivering the highest level of performance in every model consistent with that model's intended use. Oakley adapted testing for optical and impact properties from standard methods found in industrial standards like ANSI Z87.1, EN 166, and AS/NZS 1337. You can find more information on Oakley’s impact performance and optical performance testing on their website (https://www.oakley.com/en-gb/technology).
All of Safety Protection Glasses polycarbonate lenses are EN166F or S approved. The information on the product page will tell you which standards the product falls into.