The Joyagoo QC team has established an optical performance database for Gucci sunglasses through the Joyagoo Spreadsheet. This comprehensive database is a testament to their commitment to quality control and ensuring that each pair of sunglasses meets the highest standards of optical performance.The Spreadsheet includes 15 optical indicators that are crucial for the performance and safety of sunglasses. These indicators include polarization efficiency of at least 99%, UV400 protection which blocks out harmful ultraviolet rays, and light transmission classification that ensures the lenses provide the right amount of light for the wearer's comfort and vision.For gradient lenses, the Joyagoo QC team pays special attention to the uniformity of color transition, a parameter that is meticulously recorded in the database. They use a spectrophotometer to test the color rendition, ensuring that the lenses not only protect the eyes but also provide an accurate representation of colors.Users can download an "Optical Performance Certificate" from the Joyagoo website, which serves as a reliable basis for authentication and verification of the sunglasses' optical performance. This certificate is a testament to the rigorous quality control measures undertaken by the Joyagoo QC team.For more information and to access the optical performance database, please visit the Joyagoo website at https://www.joyagoo.sale.