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pupillary distance

   Also found in: Acronyms, Wikipedia 0.01 sec.
pupillary distance
n.
The distance between the center of each pupil, used in fitting eyeglass frames and lenses.


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You'll also need to know your pupillary distance (PD), which is the distance between the centers of your pupils, to ensure a proper fit.
When you order online you'll need to give your pupillary distance or PD( distance between your pupils in mm).
Because reading glasses have such a low power and they are designed only for near vision, matching up the pupillary distance is not nearly as important.
 
 
 
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