Shamir Headquarters 
A bifocal freeform lens that aesthetically conceals the line separating its upper and lower vision segments, while ensuring the smoothest transition between near and far vision zones.
With Duo, customers can enjoy the benefits of progressive lenses in a bifocal format customized to their visual needs and aesthetic preferences. Duo overcomes the challenges of traditional bifocal lenses by eliminating the highly visible upper and lower lens segment separation line.
