Trial Frame With P.D Adjustable. This frame adjustable is (Medic) type.Light weight adjustable trial frame for reduced aperture lenses & adjustable P.D. bridge. Separate PD adjustment for each eye to compensate for asymmetrical factors in facial structure. PD Scale: 24 – 38 mm for both right & left ( Approx.) Nose height adjustment : Moveable up to 14.5 mm. This is come with 1 Year Warranty.