Quality Control
  ¡¡Quanlity Guarantee ¡¡CR-39
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All products following the national standard:GB 1 08 1 0¡ª1 996£¬industry standard QB2506-2001,registered FDA number and got CE certificate£®
Zone A£º The Visual Center Zone£¬Based on The Optical Center For Classical Lens£®For Decentred Lens£®
The Zone A Based on The Middle-point of The Optical Center And TheGeometrical Center,
Size£º30mm
Zone B£º The Atea Between Zone A And Zone C
Zone C£º Area Within 5mm From The Edge of Lens£¬It Will Be Va rnished After Edging
   
 
 
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