Plactic lens
   -- 1.499 Plactic lens < 1.499 Single vision > < 1.499 Bifcoal > < 1.499 Progressive >
 -- 1.56 Plactic Lens < 1.56 Single vision > < 1.56 Progressive > < 1.56 Aspheric > < 1.56 Photochromic >
 -- 1.60 Plactic Lens < 1.60 Single vision > < 1.60 Progressive > < 1.60 Aspheric > < 1.67 Aspheric height > --1.67 Aspheric height index lens
   -- Semi-finished lens < Single vision > < Bifocal > < Progressive > -- Rx lens < Single vision > < Bifocal > < Progressive >
Glass lens
   --<1.523 White lens > < 1.523 Photo brown &1.523 Photo gray > < 1.70 High index lens >
  Products-> 1.56 Middle Index Lens
   
 
 
   
 
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