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The pupillary distance measures the distance between the center of your pupils.  This number will determine where you are looking through the lens of your glasses.

PD not provided in your prescription?  No problem!

1. Stand 8 inches away from a mirror.

2. Hold a ruler against your brow.

3. Close your right eye, then align the ruler’s 0mm with the center of your left pupil.

4. Look straight and close your left eye. Open your right eye.

5. The mm line aligned with the center of your pupil is your PD. 

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