How to Determine Your Pupillary Distance (PD)
While you can measure your pupillary distance (PD) yourself using a mirror, we recommend enlisting the help of a friend or family member if possible
- Stand 8 inches (20 cm) away from the mirror or a friend.
- Face the mirror straight on and hold the ruler just below your eyes.
- Close your left eye and align the ruler's zero to the center of your right pupil.
- While keeping your gaze straight ahead, close your right eye and open your left eye.
- Read the millimeter line directly over the center of your left pupil – this is your PD.
- Repeat these steps 3 or 4 times to ensure accuracy.ce.
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