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All products following the national standard:GB 10810—1996industry standard QB2506-2001,registered FDA number and got CE certificate
→Zone AThe Visual Center ZoneBased on The Optical Center For  Classical LensFor Decentred Lens
The Zone A Based on The Middle-point of The Optical Center And  TheGeometrical Center,
Zone BThe Area Between Zone A And Zone C
Zone CArea Within 5mm From The Edge of LensIt Will Be Va rnished After Edging
Pass Australia Standard
Pass U.S.A Standard
Pass European Standard

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