Importantly, pupil distance changes with age but stops in adults. Ideally, this should be done by an ophthalmologist who will write you prescription for prescription glasses.
Thanks to a special device — pupillometer — it is able to measure PD with an accuracy of 0. No good company dealing in the production of corrective lenses will create glasses for you without knowing this parameter, because it could expose you to serious health consequences and deterioration of eyesight.
Therefore, if you want to buy corrective glasses online and the doctor has not marked your PD on the prescription, be prepared to measure yourself. If you have such an opportunity, especially if you have a severe visual impairment, ask someone for help — then the examination will take literally a few minutes and the results will be more reliable.
Prepare a hard ruler divided into millimeters and a well-lit mirror that you can stand in front of you. For measuring the distance between the pupils, for example, a tape measure and a small mirror to which you have to bend are NOT suitable.
Stand in front of the mirror, approx. Do not bend down and keep your head straight. If another person is taking measurements, look at the object approx. What is PD? How do I know my pupillary distance? Can I just guess my PD? What is single and dual PD? What is the average pupillary distance?
My PD is 32 and the frame's PD range is from 58? When you are ready to measure your pupillary distance, download our special ruler here:. Download Now. Pupillary distance , sometimes referred to as pupil distance or just PD, is the distance between the center of each pupil and the bridge of your nose measured in millimeters.
Pupillary distance is essential for crafting prescription glasses because it helps us know where to place the center of your vision on your lenses. Two ways: You can measure it using our special ruler You can obtain it from your optometrist You may not have realized, but each time you purchased glasses from an optometrist, they measured and used your PD to craft your lenses.
Unfortunately, this measurement isn't always included on the print-out prescription you receive after an eye exam. So if you want to order eyeglasses online, you can either ask your optometrist for your PD or measure it yourself. Scroll down to our tutorials now. Do not guess your pupillary distance then order prescription glasses! PD, or pupillary distance, refers to the distance in millimeters between the center of one pupil to the center of the other. Having a correct PD on your glasses prescription ensures that you are looking through the ideal spot in your lenses.
If this number was not provided on your prescription by your eye care professional, you can measure it yourself. Your pupillary distance PD is the distance between the centers of your pupils. Your PD is an important part of your prescription because it shows exactly which part of the lens you look through. The numbers on the inside of the temple arms of some frames show the measurements for the frame itself. If you are ordering glasses online, you will need to take this measurement yourself or with the help of a friend.
Be sure to take the measurement several times to make sure you have the most accurate result. The abbreviations and numbers on your eye prescription tell the eyeglass manufacturer what type of lenses you need and how strong they need to be.
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