Opthy measures your Pupillary Distance—or PD for short—allowing you to find the most comfortable, personalized fit.
The Opthy app is available on iPhone X and above at the App Store.Available in the U.S. only.
With just a few clicks, OPTHY measures your Pupillary Distance so you get the perfect fit.
Your Pupillary Distance, or PD, is the distance in millimeters (mm) between the center of one pupil to the center of the other. A personalized fit starts with measuring your pupillary distance: it indicates which part of the lens you look through, ensuring optimal comfort and clarity.
If your PD isn't right, it can cause eye strain, fatigue, or simply not being able to see properly. The higher your prescription, the bigger the effect an incorrect PD can have. So get measuring!
SINGLE PD, or binocular pupillary distance is the standard measurement of the distance from the center of one pupil to the other. Distance PD can be used to order any type of prescription glasses except reading glasses.
DUAL PD, or monocular pupillary distance, is the distance from the center of one pupil to the center of the bridge of your nose. Dual PD has two numbers showing the right eye (OD) and the left eye (OS) measurements.
To obtain your PD measurement, simply ask your eye doctor to include it in your prescription.
Alternatively, you can use one of the following methods to measure it yourself. Super easy!
Avoid an additional appointment with the eye doctor using these steps to ascertain your pupillary distance. Just remember that the measurements will need to be in millimeters, so find a ruler with the appropriate markings.
* If you don't feel confident doing this process on your own, grab a friend or family member. They simply need to hold the ruler in place and start at step three. From there, they can take the measurement for you.
To measure your PD if you already wear glasses:
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