Dual Pd Measurement App. This number is your pd. Distance in millimeters of pd measuring range:
Measuring your segment height (sh) segment height, also commonly referred to as seg height, is the vertical measurement in millimeters from the bottom of the lens in your frames, to the beginning of the progressive addition on a progressive lens, or the top line of a lined bifocal. Eyemeasure enables you to measure your pupillary distance (eye to eye) & now segment height instantly at near and far distances. But if you have two different numbers, you have been measured for dual.
It’s accurate to up to 0.5mm for the perfect prescription glasses.
The process is nearly identical to measuring for a single pd, and you can follow the 5 simple steps on our guide to help you get started! Our dual pd ruler allows you to center it down the middle of your nose making it easy to measure the specific pupillary distances for both your left and right pupils. Pd, short for pupillary distance, is the distance between the center of your pupils in millimeters. Print it at no scaling or 100% scale setting.