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2. 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.

3. Prism cover test - Wikipedia

   en.wikipedia.org/wiki/Prism_Cover_Test

   The prism cover test (PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists, orthoptists, and optometrists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [ 1 ]

4. 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 ...

5. 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 ...

6. Optician - Wikipedia

   en.wikipedia.org/wiki/Optician

   A US Navy optician adjusting a customer's glasses. An optician is an individual who fits glasses or contact lenses by filling a refractive prescription from an optometrist or ophthalmologist. [1] They are able to translate and adapt ophthalmic prescriptions, dispense products, and work with accessories. [2] There are several specialties within ...

7. Four prism dioptre reflex test - Wikipedia

   en.wikipedia.org/wiki/Four_prism_dioptre_reflex_test

   Test can be performed at any fixation distance - near or far; Results of the test can be checked/confirmed using Bagolini glasses, W4LT (macular torch) or Synoptophore; Post-strabismus surgery aim at times, can use in post-op review; When measuring the suppression scotoma, it needs to be done on cooperative patients