The Shamir Duo™ Bifocal 1.67 Hi-Index Transitions® lenses are advanced Freeform® lenses that offer surface continuity, eliminating the visible line. It also offers optical continuity, eliminating image jump and loss of image. By eliminating these problems associated with traditional bifocal lenses, Shamir Duo™ maintains a natural, distortion-free visual path as the eye moves from one vision zone to another.

Transitions® Signature lenses rapidly darken when outdoors and fade back to clear when indoors. Choose from one of the Transitions® Signature tints of Grey, Brown or Graphite Green, or step outside the box and choose from one of the new Transitions Style Colors (limited to specific material and lens design availability) of Amber, Amethyst, Emerald or Sapphire.

High Index 1.67 lenses are lighter and thinner than the standard CR-39 plastic lenses.
Recommended prescription range for High Index 1.67 Lenses: Sphere power below + or – 6.00; Cylinder power below + or – 4.00.