Photochromic Transition Glass Spectacle Lenses from Canada
Glass spectacle lenses that darken automatically when exposed to UV light, made from specially formulated photochromic glass like Corning Photogray, unmounted and ground to prescription specifications. They qualify under HTS 9001.40.00.00 as their primary function remains vision correction despite light-adaptive properties. These lenses offer convenience for indoor/outdoor use without separate sunglasses.
Duty Rate — Canada → United States
Rate breakdown
Import Tips
• Provide activation speed and fatigue resistance test data to prove photochromic functionality suitable for spectacle use
• Avoid bulk packaging that suggests component status; import in protective cases indicating retail spectacle lens intent
• Comply with FTC guidelines on light transmission claims to support classification as corrective eyewear