Measure Pupillary Distance (PD) Online
The Pupillary Distance (PD) is the distance between the centers of your pupils in each eye. This measurement is required to place prescription glasses orders. With this measurement we can ensure that the optical centers of your lenses are aligned correctly with your pupils to give maximum comfort and effectiveness. We highly recommend leaving this measurement to the experts! Follow our step-by-step instructions below to measure your pupillary distance online.
How to Measure PD With a Credit Card
Remove your glasses if you are wearing any.
Ensure you're in a well-lit environment for enhanced accuracy.
Place a card with a magnetic stripe against your lips.
Any card with a magnetic stripe, like a credit card, works perfectly. Align it as demonstrated.
Face the camera straight on and capture a photo of your face.
Adjust the camera angle so you're looking directly into it, ensuring clear visibility of your pupils.
How to Measure PD With a Ruler
- Get a millimeter ruler and sit or stand in front of a mirror.
- Look straight ahead and put the ruler horizontally in front of your nose.
- Measure the distance between the centers of each pupil to the center of your nose bridge individually.
- Record both measurements as your dual PD value, noting the right eye (OD) measurement first, followed by the left eye (OS) measurement.
- If both measurements are the same, you have a single PD. In this case, add the measurements together to obtain your single PD value.
- Repeat the process a few times to ensure accuracy.
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PD Measurement FAQs
What is the difference between a single and dual PD measurement?
Single PD is the combined measurement of the distance between each pupil and the bridge of the nose when the individual distances are equal. Dual PD refers to the measurement of the distance between the centers of each pupil, also measured separately for each eye (OD and OS).
Learn more about PD measurement in our Single PD vs. Dual PD Measurement blog post.
How do you measure PD for progressive lenses and bifocals?
For bifocal and progressive lenses, two PD values are needed. In these cases, Yesglasses recommends getting your PD directly from your eye care professional.
What is the average PD?
The average pupillary distance for adults is between 54 mm and 74 mm. The average pupillary distance for kids is 43 mm and 54 mm.
How do you measure PD by yourself?
You can measure your own PD with a ruler and a mirror. Be sure to note which eye you are measuring, read the ruler properly in your reflection, and take multiple measurements to check for accuracy. We highly recommend letting Yesglasses measure your PD for you!
Can I measure my PD with a webcam?
When choosing to use a webcam to take your picture, be sure you are in natural lighting and that your picture clearly shows your pupils. Follow our instructions to use a credit card for measuring the distance and send us your picture.
Does Yesglasses measure PD online for free?
Yes! Our online PD measurement tool is entirely free and even gives you access to discounts while shopping with us.
How do you measure your PD without a ruler?
An easy way to measure your PD is with a credit card. Follow our instructions to take a picture of yourself with a credit card. Then, submit your picture, and we’ll do the rest!
How do I find my PD on my prescription?
In most cases, your optician will include your PD measurement in your prescription after the eye examination. If not, just ask for it! Your PD will be listed in a section separate from your eyes’ prescription either as two numbers for each eye’s distance from your nose bridge or a total number for the distance between your eyes. Give them a call if you’re unsure, or email us your prescription and we will take a look for you!
Why measure your pupillary distance with Yesglasses?
Trust our eyewear experts to determine your PD. This measurement is essential to providing you with your correct prescription lenses.
When you measure your PD with Yesglasses, we will automatically update your order! You can continue shopping for your perfect pair of eyeglasses, and we’ll make sure your order is accurate with the correct PD measurement.
NOTES
- Please make sure you have removed your eyeglasses.
- Put a credit card on your lips. (Or a card that has the same dimensions.)
- The card should be straight up and down against your lips, not tilted.
- Do not cover the edges of the card.
- Look straight ahead when taking the picture.
- Open your eyes so we can see your two pupils clearly.
- Take the photo at arm's length.
Thank you for using our PD Measurement Tool!
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Order your glasses now! Your PD measurements will automatically be updated to your order.