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HSChapter 70
Unworked glass blanks destined for corrective spectacle lenses occupy a narrow but technically precise niche in the ophthalmic supply chain — they have not yet undergone the grinding or polishing that produces a finished prescription lens. Switzerland dominates US supply under this heading, reflecting that country's deep integration in precision optical manufacturing. Importers should note that tariff line 7015100000 covers the full scope of this heading, and classification hinges on confirming the blank has not been optically worked, which would shift it to a different chapter.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Glass classified here has not been ground, polished, or otherwise shaped to a specific optical prescription. Once a blank undergoes optical working — such as surface grinding to a diopter value — it typically moves out of Chapter 70 and into Chapter 90 as an ophthalmic lens. Importers should verify the processing state with their supplier before filing.
Switzerland hosts several major precision optical glass manufacturers whose production standards align with the tight tolerances required for corrective lens blanks. The country's long-standing expertise in optical and watchmaking glass gives it a structural advantage in supplying high-specification unworked blanks to US ophthalmic labs.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| INDIA | -- | $95K | +$95K |
| PANAMA | -- | $36K | +$36K |
| BAHAMAS | -- | $11K | +$11K |
| COSTA RICA | -- | $3K | +$3K |
| BOLIVIA | -- | -- | -- |
Monthly import values over time