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
   
 
Features of design

Short corridor (14mm to full addition power)

Minimum fitting height of 17mm

Low distortion soft,aspheric design

Individual designs or left and right eyes
1.56 PHOTOCHROMIC LENSES DIMENSIONS
 
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