Guide To Measure PD
Measure Your Pupillary Distance (PD)
You will be asked to mention your PD with your prescription while placing an order for eyeglasses. Learn more about your pupillary distance here.
Why We Measure PD?
Your PD measurement is used to help the prescription lenses to be centralized correctly. Thus, it should be as accurate as possible.
How to Measure Your PD
You can ask your ophthalmologist to include you PD measurement on your prescription. Alternately, you may use the following steps to help you figure it out yourself.
Step 1: Print the Eye Winsome PD Scale given above.
Step 2: Stand straight about 8 inches for from a mirror.
Step 3: Hold the ruler against your eyebrow.
Step 4: Close your right eye and keep the ruler’s zero to the center of the left pupil.
Step 5: In the same position of your face and scale, close your left eye and open the right one.
Step 6: Note down the mm reading that is indicating the center of your right pupil.
This is your Pupillary Distance (PD).
- Measure your PD 3, 4 times to get accurate results.
- Range of Adult’s PD: 54-74 mm
- Range of Child’s PD: 43-58 mm
Single PD and Dual PD
Single PD is the pupillary distance between the centers of your pupils, 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.