Look straight ahead into the mirror and position the ruler over the bridge of your nose. Starting with the right eye, line up the zero end of the ruler at your pupil; measure the distance from your right to your left pupil. The millimeter number that lines up with your left pupil is the measurement you want.
What if my eye prescription does not have a PD?
The doctor during your exam does not take your PD at anytime during your exam, as that is left to the optician who is going to make your eyewear. Having an inaccurate PD will not harm you, but may make your vision uncomfortable, strained and in the worse case scenario, cause double vision.
How do I figure out my PD for glasses?
Starting with the right eye, line up the zero end of the ruler at your pupil; measure the distance from your right to your left pupil. The millimeter number that lines up with your left pupil is the measurement you want. That number is your PD. Jot it down.
Is Online PD measurement accurate?
The mobile app uses image processing to find the center of both eyes and the calibration marks on the frames, determining the PD to an accuracy of +/-1mm. The PD number is computed and stored securely in the cloud and accessible via the mobile app or in the consumer's personal dashboard online at eyeque.com.Jan 7, 2019