How To Measure PD | Prescription Glasses Online - GUNNAR

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MEASURING YOUR PUPIL DISTANCE

Your prescription is not complete without one last little detail, the PD or Pupil Distance. To find your PD you’ll need a ruler and a mirror, but don’t worry. It’s simple and easy to find!

HOW TO MEASURE PUPIL DISTANCE (PD)

Pupil Distance is a measurement of the distance between pupil to pupil. It’s measured in millimeters and can be easily calculated in front of a mirror with a ruler. Just put the 0 directly beneath the center of your right pupil, and then measure the distance to the center of your left pupil. It’s that easy!

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NOTE: PUPIL DISTANCE IS THE MEASUREMENT BETWEEN THE CENTER OF BOTH PUPILS. THE UNIT OF MEASUREMENT IS MILLIMETERS.