Sunglasses, Spectacle Frames, Spectacle Lens and Magnifying Spectacles. U.S. Food and Drug Administration. https://www.fda.gov/medical-devices/guidance-documents-medical-devices-and-radiation-emitting-products/sunglasses-spectacle-frames-spectacle-lens-and-magnifying-spectacles. Accessed January 30, 2026.
GUIDE TO U.S. REGULATIONS & MANUFACTURING STANDARDS COVERING EYEGLASS FRAMES, PRESCRIPTION LENSES AND FINISHED EYEWEAR SOLD IN THE U.S. The Vision Council. https://thevisioncouncil.org/sites/default/files/assets/media/VC_GuideToUSRegulationsAndManufacturingStandards_2020.pdf. Accessed January 30, 2026.
DISPENSING GUIDE. The Vision Council. https://thevisioncouncil.org/sites/default/files/assets/media/Dispensing-Guide_2020.pdf. Accessed January 30, 2026.
ANSI Z80.5-2004 American National Standard for Ophthalmics—Requirements for Ophthalmic Frames. ANSI Blog (document PDF). https://blog.ansi.org/wp-content/uploads/2020/11/ANSI-Z80-5-2004.pdf. Accessed January 30, 2026.
How to Keep Glasses From Slipping. Warby Parker. https://www.warbyparker.com/learn/how-to-keep-glasses-from-slipping. Accessed January 30, 2026.