In most cases, PD value ranges from 57 to 65 mm, with the most common one being 63 mm. At times you will find PD written as 63/61. In such cases the first value is for Distance PD which may be entered while placing order and the other value 61 is near PD. 

Repeat this process a couple of times to ensure you have an accurate measurement.

Read out our detailed infographical guide below to measure your PD.

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How to Measure PD