PD (Pupillary Distance) is the distance between the centers of your pupils,
measured in millimeters (mm). It helps position your lenses correctly so
you get clear, comfortable vision.
Why is PD important?
Correct lens alignment
Sharper, clearer vision
Reduces eye strain and headaches
Types of PD
Single PD: One total number (example: 62 mm)
Dual PD: Separate measurements for each eye (example: 31 / 31)
How to measure PD at home
Stand in front of a mirror
Hold a ruler against your forehead
Align zero with one pupil
Measure to the center of the other pupil
You may also find your PD on a previous prescription or ask your optician.
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