How To Use PDCheck: The Pupillary Distance App

man user


man user

EyeQue Team

man user

May 31, 2019

An older man using EyeQue's PDCheck pupillary distance app

We love ordering eyeglasses online. But before you can place an online order for your glasses, you’ll need to take a measurement called pupillary distance (also known as PD) to help the manufacturer craft your eyeglasses. There are a few ways to measure your pupillary distance. You can use a pupilometer at the eye doctor, a ruler, a pair of glasses, or you can use a pupillary distance app.

What is pupillary distance, and why does my eyeglasses manufacturer need it?

Pupillary distance is the distance between the center of your pupils. This tells the manufacturer how to center your lenses properly.

What the best way to measure my pupillary distance?

Some people try to measure their pupillary distance using a ruler, but it’s difficult to take this measurement without accidentally looking at the ruler from an angle or tilting the ruler against your face. The easiest and most accurate way to measure your PD is with a pupillary distance app like our PDCheck app.

How do I use the PDCheck app?

It’s very easy to use the app! Here’s how:

  1. Order your PDCheck Frames. You’ll notice the frames have small T-shaped marks on them, which allow the app to accurately measure distance.
  2. Download the free PDCheck app on your Android or iOS mobile device.
  3. Put on the PDCheck Frames and take a photo of yourself with the app. It’s best to take this photo in an area with good lighting.
  4. The app will have you drag and drop T marks on the screen to overlap the T marks on your frames in the photo. This allows the app to provide you with an accurate pupillary distance measurement instantly.
  5. Report your PD measurement to your eyeglasses manufacturer and order your fabulous new glasses.
  6. Share the love! Once you have your PDCheck Frames, any of your friends and family can download the free app and borrow your frames to get their own pupillary distance measurement.

Your Vision at Your Fingertips

With the VisionCheck you can test your vision from home and use the results to order glasses online. Updating your glasses has never been easier!

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