Prism Glass Spectacle Lenses from Canada
Glass lenses incorporating prism diopters to correct eye alignment disorders such as strabismus or diplopia, featuring base-in/out prism ground into the prescription surface. These unmounted, optically worked lenses are essential for binocular vision therapy. They remain under HTS 9001.40.00.00 as their primary role is spectacle-based vision correction.
Duty Rate — Canada → United States
12%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include ophthalmologist prescription specs showing prism base and power (e.g
• 2Δ BI) to confirm medical necessity
• Ensure bilateral/single eye marking to distinguish from paired orthopedic insoles classification rules