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2. Pupillary distance - Wikipedia

   en.wikipedia.org/wiki/Pupillary_distance

   Purchasing glasses online can be a potential problem if the PD measurement isn't available. [16] In both the UK and most of Canada (excluding British Columbia [ 17 ] ), the PD measurement is categorized under dispensing rather than eyewear prescription of the person whose eyes were tested, thus there is no obligation for PD to be provided on ...

3. Pupilometer - Wikipedia

   en.wikipedia.org/wiki/Pupilometer

   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. [ 35 ] [ 36 ] Some mobile apps have eliminated the need for a reference object to make accurate PD measurements by leveraging depth imaging and advanced algorithms now ...

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. 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. You should also measure ...

6. 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 ...

7. Zenni Optical - Wikipedia

   en.wikipedia.org/wiki/Zenni_Optical

   To order glasses, customers need to provide their eyeglass prescription and a measurement of their pupillary distance (PD). [25] Zenni has a web page that supports measuring the PD. [19] Columnist Mary Hunt praised Zenni for offering "the absolute cheapest prices on plastic frames" and said it has "a wide range of frame styles and lens options ...