Should I Use a Pupillary Distance App or Ruler?

man user


man user

EyeQue Team

man user

May 29, 2019

How to Measure Pupillary Distance

When you purchase a pair of eyeglasses, the manufacturer needs several measurements to ensure the frames and lenses will properly correct your vision. One of these measurements, pupillary distance, allows the manufacturer to ensure your lenses are centered on your pupils.

What Is Pupillary Distance?

Pupillary distance, also called interpupillary distance or PD, measures the distance between your pupils. You need this measurement to be able to purchase eyeglasses online.

What Is the Best Way to Measure Pupillary Distance?

Optometrist Measuring Pupillary Distance

While you can visit an eye doctor to ask them to measure your pupillary distance, many clinics charge a fee to take this simple measurement.

Instead, you can measure the distance on your own at home by using a ruler or a pupillary distance app like PDCheck. We recommend using a pupillary distance app because it will usually provide a more accurate measurement.

How Can I Measure Pupillary Distance With a Ruler?

Pupillary distance measurementHere are the steps you can take to measure your PD with a ruler:

  1. Find a friend or family member who can help.
  2. Find a ruler with measurements listed in millimeters—this is the unit of measurement eyeglasses manufacturers will require.
  3. Hold the ruler up to your face, and have your friend measure the distance between your two pupils. Be sure they are looking at the ruler straight on (not from an angle), and that the ruler is not tilted.

How Can I Use a Pupillary Distance App?

EyeQue PDCheckGuarantee an accurate pupillary distance measurement with EyeQue’s PDCheck app:

  1. Order your PDCheck Frames, which have special T-shaped marks to help the app to properly measure distance.
  2. Download the free PDCheck app on your Android or iOS smartphone, and put on your PDCheck Frames.
  3. Use the PDCheck app to take a photo of yourself wearing the frames. Then the app will have you line up T marks on your screen with the T marks on your PDCheck Frames in the photo. You’ll have your results in no time!

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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