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1 Measure the distance between the two dots on your lenses with a millimeter ruler. 2  That's your distance PD. 3  If you need a near PD for reading or computer glasses, just do the same procedure but focus instead on the object you will be looking at, either reading material or computer monitor.
Answer Wiki. You can absolutely go to your local optical shop and ask them to measure your PD. However, some opticians and optical stores will not measure this for you unless you purchase glasses from them. If you are ordering single vision glasses, you can measure your PD online here: Measure My PD.