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2. Pupillary distance - Wikipedia

   en.wikipedia.org/wiki/Pupillary_distance

   Distance PD is the separation between the visual axes of the eyes in their primary position, as the subject fixates on an infinitely distant object. [2] Near PD is the separation between the visual axes of the eyes, at the plane of the spectacle lenses, as the subject fixates on a near object at the intended working distance. [3]

3. List of optometric abbreviations - Wikipedia

   en.wikipedia.org/wiki/List_of_optometric...

   PD Pupillary distance PERRLA Pupils equal, round, reactive to light and accommodation PH Pinhole see Pinhole occluder and Visual_acuity#Legal_definitions: PHNI Pinhole No Improvement see Pinhole occluder and Visual_acuity#Legal_definitions: PHVA Pinhole Visual Acuity: PL Perception of light POH / PrOH Previous ocular history PPA Peri-papillary ...

4. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   PD or IPD Pupillary Distance or Interpupillary Distance, respectively. It is the distance between pupil centers. BVD Back vertex distance is the distance between the back of the spectacle lens and the front of the cornea (the front surface of the eye). This is significant in higher prescriptions (usually beyond ±4.00D) as slight changes in the ...

5. This Is What Those Numbers on Your Glasses Mean - AOL

   www.aol.com/lifestyle/why-know-those-numbers...

   The post This Is What Those Numbers on Your Glasses Mean appeared first on Reader's Digest. The numbers on your eyewear are more important than you think—an optometrist tells us why. The post ...

6. Pupilometer - Wikipedia

   en.wikipedia.org/wiki/Pupilometer

   In addition to having PD measured in a retail setting, a variety of web and mobile (Android and iOS) apps are now widely available. Web apps are used by a variety of online sellers of eyeglasses where an object of known size, such as a credit card, is needed to assist (size reference) the measurement process.

7. I tried those Pair Eyewear glasses with the magnetic ... - AOL

   www.aol.com/lifestyle/tried-those-pair-eyewear...

   If you've never ordered glasses online before, you'll want to be sure to have an updated prescription close at hand, complete with pupillary distance (PD) measurements.