– You can ask your eye doctor to include your PD measurement on your prescription.
-You can also measure it yourself by following this step.
Step 1: Print EASY SIGHT PD Scale given above.
Step 2: Stand Straight about 8 inches for from the mirror.
Step 4: Close your right eye and keep the ruler’s zero to the centre of the left pupil.
Step 6: Note down the mm line that is indicating the centre of your right pupil.
Step 3: Hold the ruler against your eyebrow.
Step 5: In some position of your face and scale, close your left eye and open the right one.
This is your PD.
Measure your PD 3, 4 times to getting an accurate result.
Range of Adult PD: 54-74 mm
Range of Child PD: 43-58 mm
MEASURE YOUR PD WITH THE HELP OF FRIEND
Stage 1: Keep the two eyes open.
Stage 2: Ask your mate to put the zero of the scale on the focal point of your understudy of one eye.
Stage 3: Then measure the separation of the focal point of the understudy of the other one.
TIPS WHEN A FRIEND IS MEASURING
1. Keep your eyes as still as possible.
2. Do not look at the person who is measuring
Single PD and Dual PD
SINGLE PD is the pupillary distance between the centre of one pupil to the other, which can be a distance PD or near PD. Distance PD can be used to order any type of prescription glasses except reading glasses. Read below to learn how to calculate near PD for reading glasses.
DUAL PD, or monocular PD, comprises of two numbers and is the separation between the focuses of every understudy to the scaffold of the nose. Dual PD is normally written in the accompanying documentation: 32/30. The primary number is consistently the correct eye (OD) measurement, and the subsequent number is the left eye (OS).
How Do You Calculate Near PD For Reading Glasses?
You can calculate Near PD for reading glasses by taking away 3mm from your separation PD. For instance, in the event that your separation PD is 63mm, at that point your close to PD is 60mm.
If you are using Dual PD to calculate near PD, then subtract 1.5mm from each eye’s measurement. For instance, if your dual PD is 33/31mm then your near PD would be 31.5/29.5mm.