Pupil Distance Meter is an iOS app that uses a camera and a known size reference object to measure pupillary distance. Pupillary Distance is needed when you want to order eyeglasses. Now you can measure it yourself using this app or ask your friend to measure your PD.
Inch, mm, cm units are supported in the app. Zoom View feature allows you to align the pointers on the screen accurately. The option to share PD results is also available in the app. Timer feature helps the user to perform measurement on himself using front camera.
To achieve accurate and consistent results two successive pictures has to be taken and marked according to the guide. Afterwards the app estimates average pupillary distance and shows results at the top.
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Pupil Distance Meter for iOS. How To Measure Pupillary Distance (PD).
If you use a credit card as a reference and share your measurement results with a screenshot, please MAKE SURE YOUR CREDIT CARD INFORMATION IS NOT VISIBLE. You are sharing your information on your own risk, VisTech.Projects LLC is not responsible for it.
Simulation has been performed to check measurement accuracy using a model where the distance is very simple to measure with the ruler as shown on the picture.
The PD distance for this model is ~26-27 mm.
PupilDistanceMeter has been used to measure the same distance and to compare results.
As described in the “How To Use” section two successive pictures are taken with different scale by moving only camera from the object to different distance. The reference length (ROL) - in this case long side of a credit card - is marked with the blue ruler. The white ruler is used to measure PD (pupillary distance). Two measurements are to be confirmed ("ON") with the switch button at the lower right corner. To switch between pictures “1 | 2” buttons are used.
When measurements on both pictures “confirmed” the PD result is shown at the top of the screen.
The final average result PD = 26.59mm.
10-Oct-2015: v1.0.8 - bugs fix and accuracy test results
26-Feb-2015: v1.0.4 - iPhone 6, 6+ and 64-bit support
21-Jul-2014: v1.0.3 - fix and more info for proper measurements
18-Jun-2014: v1.0.2 - bug fix and improvements.
09-Jun-2014: v1.0.1 - bug fix and improvements
31-May-2014: v1.0.0 - Release.