- How To Choose Eyeglasses
- How to fill out your prescription
- How to Measure Your PD
- How to Measure Your Frame Size
- Eyeglasses For Your Face Shape
- Lenses And Coatings
- Bluelight Protect Lens
- How To Adjust Your Eyeglasses
How to Measure Your Pupillary Distance(PD)?
What Is
Pupillary Distance(PD)?Pupillary Distance (PD) is the distance, in millimeters, between the center of one pupil to the center of the other. The PD is needed to manufacture your eyeglasses because it determines the exact optical center of the lens, which is the point where you look through the lens.
Printable PD ruler
Print this page on A4 (without scaling, at 100%. ) Use PD ruler at the bottom of the page. Recommend to use a physical PD ruler or consult your ophthalmologist.
Steps to measure your PD
Note: The average PD is between 54 and 78mm. Might be a bit different compared to practical measurements. Please measure your PD 2-3 times to ensure you get the accurate results.
Step1
Position yourself arm’s length from your friend or yourself approximately 8 inches (20cm) away from a mirror. Please measure your PD 2-3 times to ensure you get accurate results.
Step2
Close your right eye and align the 0 mm over the center of your left pupil.
Step3
Close your left eye and note the reading directly over your right pupil. That will be your Total PD.
Step4
You also need to measure the distance from two pupils to the center of your nose respectively to make sure that if you have two PDs (OD & OS).
