You can ask your ophthalmic practitioner or optometrist for an accurate PD measurement after your eye exam. Usually, opticians do not give out your PD measurement as the law does not require them to give it to you. Some opticians may even charge you for dispensing your PD information.
Your dispensing optician should ensure that your glasses fit correctly and that the pupillary distance on your lenses is correct.
If you don’t know your pupillary distance, you can measure it yourself at home with the help of a friend or the mirror.
How to measure your pupillary distance?
With a mirror
*Standing 8 inches away from a mirror, hold a ruler against your eyebrow.
*Close your right eye and align the ruler’s 0mm with the center of your left pupil. The millimeter-scale should be pointing upwards.
*Look straight ahead and shut your left eye while keeping your right eye open.
*Your pupillary distance will be the millimeter line that lines up to the center of your right pupil.
With a friend
*Focus on something 20 feet away from you.
*Have your friend positioned just outside your peripheral vision at roughly the same height as you and get them to hold the ruler across your brow.
*Ask them to line up the ruler’s zero to your right pupil and measure across to your left pupil.
How to measure pupillary distance using old glasses?
*Keep your focus on an object 20 feet away.
*Mark a dot on your left and right lenses, where the object appears.
*Measure the distance between both the marker dots using a millimeter ruler. Your PD is the distance between these dots.
What is the average PD?
A PD measurement between 58-68 is considered normal for men and women. The average pupillary distance for a man is 64mm and for women 62mm. For this reason we have set our default PD measurement at 63mm.