Ray-Ban Square Ii Rb1973 13183A - Optics Online。The legendary I-shape metals family make a comeback from the ‘70s vault to celebrate the trailblazing Ray-Ban heritage. Oversized geometrical shapes catering to a sense of freedom and individual self-expression. The RB1973 Square II is a full-hearted celebration of the boho chic of the 70s. Feeling like a movie star and acting like one too – that’s the attitude the square brings to the party. Available in a variety of metal finishes with solid, gradient or Photochromic lenses that seemlessly adapt to all light conditions, from light indoors to dark outdoors.