https://www.fda.gov/regulatory-information/search-fda-guidance-documents/viewing-optics-sighting-telescope-laser-notice-8
Viewing Optics - Sighting Telescope (Laser Notice 8) | FDA
To: All Manufacturers and Potential Manufacturers of Laser Products Subject: Applicability of Viewing Optics Performance Requirements to a Sighting Telescope...
viewing opticssightingtelescopelasernotice