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Thread: What is PD and is it necessary?

  1. #1
    Keego Glasses is offline Junior Member
    Join Date
    Apr 2009
    Posts
    13

    Default What is PD and is it necessary?

    Hey, when I fill the my prescription online, PD is requested, but there is no "PD" on my prescription form. What is PD and is it necessary?

  2. #2
    Calamine glasses is offline Junior Member
    Join Date
    May 2009
    Posts
    23

    Default

    Pupillary Distance (PD) is the distance (usually measured in millimeters) between the centers of the pupils in each eye. This measurement is used when assembling prescription eyeglasses. Positioning lenses correctly in relation to the pupil centers is especially important.

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