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Measure Pupil Distance
Pupillary distance (PD for short) is used for proper fitting of prescription glasses. As an adult, your PD never changes - even when your prescription changes. You can request your PD measurement from your optician when you receive your prescription. You can also easily measure your PD yourself:
Or, you can do it manually following the instructions in option 2 below.
Option 1 - Online Tool
Option 2 - Manual Instructions
Step 1:
Place a ruler with millimeter measurements on your nose, with the starting point centered on the pupil of one eye
Step 2:
Stand in front of a mirror and look straight. Measure the distance from the centre of the first pupil to the centre of the second pupil. A friend can help in reading the measurement but they must be at the same height as you.
Step 3:
The PD value should be accurate so that your prescription glasses are sized correctly for your face; we recommend that you confirm your PD properly by taking the average of 3 measurements.
