Pupillary Distance Measure X - get your accurate PD with 1 tap only.

Pupillary Distance is the distance between the centers of the pupils. PD is needed when purchasing glasses online or adjusting your IPD settings in VR headset or other optical instruments, so that the centers of your eyes coincide with the optical centers of the lenses. PD value changes when you look into the distance or when you read, so you would need different PD values for distance and reading eyeglasses.

You can find out your PD from your glasses prescription or by visiting your optician, but if you don’t have such options, you can measure PD yourself.
There are several common methods for measuring PD:

1.  A millimeter ruler can be used for measurements. You can do it yourself using a mirror or asking a friend. This method is not the most accurate and requires certain skills and patience, especially if you need both distance and near PD values.
2. Using a phone camera and a mobile application. Such apps require a known size object (e.g. credit card) and a clear understanding of the measurement procedure in order to get an accurate result. Usually it takes some time to learn the application and you would need to perform multiple measurements to avoid errors.

Pupillary Distance Measure X

Our Puillary Distance Measure X app utilizes the new features of the iPhone X and newer devices to avoid the disadvantages of mentioned above methods. You can get accurate distance and near PD values in a matter of seconds.

The app has the following distinctive features:
- no need for any additional objects (ruler, card, mirror) or assistance
- automatic pupil centers detection
- distance and near PD with 1 tap only

We hope you will appreciate the convenience of our app.
If you have any questions or suggestions for further improvements or if you are interested in similar solution for your online business, please contact support@vistechprojects.com.

Enjoy the app!

Pupil Distance Meter PRO on Android released from Beta.

We have been working on a new app for pupillary distance measurements for some time in order to improve accuracy and usability of the app and have achieved good results, confirmed by our beta testers:

"Awesome app! So easy to use, took 3 times and each time within margin of error! Thank you for the awesome app! App is stable and worked just as intended." (Galaxy S8+, Android 7.0)

"Very accurate. Doctor prescribed pd:64. App pd first reading 64 second reading 64.5" (Galaxy S8, Android 8.0)

"Pretty cool and makes it super easy to use and order glasses online." (Galaxy S7 Edge, Android 7.0)

The app is very intuitive and guides a user from taking a picture to accurate PD result step-by-step. Now you can make multiple measurements in one session (the feature has been requested by many users) to confirm your result:

Multiple PD measurements

Of course you can always get your PD from a local optician and we encourage you to do so, if you need to check your vision and do other tests. But if you simply need to order eye- or sunglasses online or doctor visit is not an option for you, you can always use this app and save towards your eye-wear purchase. You can also use this app to check your interpupillary distance (IPD) for VR headset.

Now the app is available on Google Play and made into top 10 in the Health and Fitness category. 

Pupil Distance Meter Pro ranked #6 

If you want to test and support the app please contact us for promo code. 

Enjoy the app and please support it on Google Play if you like it.

Thank you!

[iOS] How to measure your pupillary distance (PD) accurately. Video guide for Pupil Distance Meter.

We have released a new video guide for Pupil Distance Meter app on iOS. The app performs accurate PD measurements if used properly. From the video you will learn about app accuracy and how to measure pupillary distance, avoid common mistakes and achieve the best result. 

[iOS] Pupil Distance Meter Simple Edition: quick and simple Pupillary Distance measure

Pupil Distance Meter is a tool for quick PD measurements using a rear or front camera on your mobile device and any standard card (e.g. gift card, id card, credit card, etc)

Simple Edition of the app has simple measurement procedure that allows you to achieve more accurate and consistent measurement results.

 

Pupil Distance Meter Simple Edition.

How to use:

1. Take a face picture with a reference card (see picture below how to hold the card properly)
2. Mark eye pupils with the white ruler 
3. Mark a reference card length with the blue ruler
4. See PD result  at the top

For accurate and repeatable measurements you would need to hold a reference card next to your eye corner on the left or right side of your face. The card  has to be on the same vertical plane with your eye pupils and be parallel to the camera / display. 

How to hold a reference card properly

For the best result do not bring the camera close to your face and keep it at arm's length or farther. Don't focus your eyes on the camera when taking a picture, try to look "through" the device - by doing this you can avoid bringing additional error when fixing  pupils at one point.
As a final step make sure your PD result is within normal measurement range:  50 - 78 mm for adults (41- 55 mm for kids). If it's not, please check the above instructions thoroughly and try again.

If you have questions about the app or have improvement suggestions, please contact us.

[Android] Pupillary distance measurements in your app using Pupil Distance Meter.

Pupil Distance Meter (PDM) can be called now from your app to get PD measurements. See code example below for details how to use it.

How to call from your application:

Intent intent = new Intent("com.vistechprojects.pupildistancemeter.action.MEASURE_PD");
intent.setDataAndType(IMAGE_SOURCE_URI, "image/*"); // comment this line if you don't pass image uri
startActivityForResult(intent, REQUEST_CODE); // replace REQUEST_CODE with your constant

Example how to get results:

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
...

if (resultCode == RESULT_OK && requestCode == REQUEST_CODE){

     JSONObject json = new JSONObject(data.getStringExtra("PDM_OUTPUT_JSON"));

     ...

}

...
}

JSON returned from Pupil Distance Meter: 

{"APP_RESULTS":{"pd":"67", "right eye":"33.5", "left eye":"33.5", "units":"mm"}}

[Android] Pupil Distance Meter v2: improved design, performance and accuracy.

Pupil Distance Meter is a tool for quick PD measurements using a rear or front camera on your mobile device and any standard card (e.g. gift card, id card, credit card, etc)

Version 2.0 of the app has new design, improved performance and slightly simplified measurement procedure that allows you to achieve more accurate and consistent measurement results.

Pupil Distance Meter 2.0. New design.

How to use:

1. Take or load a face picture with a reference card (see picture below how to hold the card properly)
2. Mark eye pupils with the white ruler 
3. Mark a reference card length with the card template (green)
4. See PD result 

For accurate and repeatable measurements you would need to hold a reference card next to your eye corner on the left or right side of your face. The card  has to be on the same vertical plane with your eye pupils and be parallel to the camera / display. 

How to hold a reference card properly

For the best result do not bring the camera close to your face and keep it at arm's length or farther. Don't focus your eyes on the camera when taking a picture, try to look "through" the device - by doing this you can avoid bringing additional error when fixing  pupils at one point.
As a final step make sure your PD result is within normal measurement range:  50 - 78 mm for adults (41- 55 mm for kids). If it's not, please check the above instructions thoroughly and try again.

If you have questions about the app or have improvement suggestions, please contact us.

[iOS] Pupil Distance Meter: accurate pupillary distance measurements.

Accuracy Test Results

Pupil Distance Meter is a tool for PD measurements using a camera on your mobile device.  

iOS version of the app uses improved approach, which allows you to achieve more accurate and consistent measurement results.

On the left you can see results of accuracy tests taken with Pupil Distance Meter on iPhone.

In accordance with  the measurement procedure, two successive pictures were taken from different distances to get an average result. Then pupils and the credit card were carefully marked with the special rulers on the screen. As soon as the layout of the features were confirmed with BOTH switch controls at the bottom right corner, correct PD distance were calculated and shown at the top of the screen. 

As you can see on the picture, the result from the app is very close to the true data measured with a usual ruler.

You can achieve the same good results, if you thoroughly follow the instructions and tips from one of our previous posts about Pupil Distance Meter on iOS.

If you have questions about the app or have improvement suggestions, we would like to hear from you in the comments below or by e-mail.

Pupil Distance Measure for iOS. Important tips and update. How to measure pupillary distance properly.

New update v1.0.3 for the iOS version of Pupil Distance Meter has been released.

We have made some improvements to the measurement process and also included important information on the screen during the measurement procedure. It should help to understand key point for the successful and accurate measurements.

The info button at the upper right corner of the screen provides content-dependent info / help. It means the information shown on touch is related to the current measurement step or state of the app. Thus you can see help tips at each step of the measurement procedure.

The basic and main app states are:

- taking two SUCCESSIVE pictures of a face with a reference (e.g. credit card) automatically during one session. 3 sec interval allowed  to move the camera from the face to fit a new pattern scale.

- marking pupils and reference bounds with the screen rulers on BOTH (!) images

- rulers alignment confirmation using switch at the right bottom corner (have to be done for BOTH pictures)

ONLY after the rulers are properly aligned and confirmed for BOTH pictures - the actual measurement results are shown at the top of screen.

Although all important key points are mentioned in the video

we still see that some users have difficulties with understanding  the measurement procedure and it causes improper results.

The accurate results can be achieved ONLY  if you:

- follow the instruction thoroughly (see video)

- make accurate ruler alignment

- DO NOT MOVE OR TILT OR SHIFT YOUR HEAD AND  REFERENCE (!)  while taking two successive picture. It is VERY important that pictures are taken for the same head and card position (!).  ONLY PART YOU CAN MOVE  between taking 1st and 2nd pictures is YOUR DEVICE.

We hope this info can help you to understand the measurement procedure better and improve your experience with the Pupil Distance Meter app  that is designed to provide accurate PD measurement.

If you have questions or suggestions please contact support@vistechprojects.com, we will be glad to help you.