Measure PD
How to measure your Pupillary-Distance (PD)? Your PD measurement is needed for the correct position of your lenses within the frame you have selected. Measure your PD with your old glasses, look straight at a mirror, place a dot in middle of each lens at the center of the pupil (black dot) and use a millimeter ruler to take your measurement between the two dots. Confirm this by having a pro measure the distance from the center of the pupil (black dot) in one eye to the center of the pupil in the other eye. To measure your PD:
