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  1.56 PHOTOCROMIC - INDEX 1.56
Photochromic lenses have an adjustable tint that changes with the amount of available light.
In bright sunlight, they darken; indoors, they become clearer.
As photochromic lenses darken they reduce glare that can contribute to eye strain.

  INDEX(ND)   1.56
  ABBE VALUE(VD)   40
  SPECIFIC GRAVITY   1.19
  METERIAL   Resin
  COATED COLOR  
  DIAMETER   75,72mm