Easily measure your pupillary distance (PD) at home. Fast, accurate, and user-friendly. Try it now > Why is it important? Every set of prescription lenses has an “optical center”, which should align with where you look through the lens. Pupillary distance is used to determine this and...
Learn how to measure your pupillary distance & get answers to common questions such as what is a PD measurement & why it's important to your prescription.
To make your glasses we need your pupillary distance. Use our online PD tool to discover yours. ✓Online PD measurement ✓Easy to use ✓Free of charge
Pupillary distance, also called interpupillary distance or PD, is a measurement of the distance between your pupils. Pupils are the dark centers of your eyes thatwiden to let in lightor narrow to focus on a close object. They help you see in the dark or when it’s too bright. Pupilla...
Discover how to measure your pupillary distance and understand why it's vital for your eyewear. Find the perfect fit for your glasses using our Opthy app.
Why is my PD not on my prescription?Your PD (pupillary distance) may not be included in your prescription for several reasons. Some eye care professionals do not routinely include PD in prescriptions, especially if you purchased glasses from different providers. Additionally, PD measurements can ...
Can I just guess my PD? Do not guess your pupillary distance then order prescription glasses! Pupillary distance must be accurate for prescription glasses to properly work. Think of it like guessing your shoe size: If you end up with a pair of shoes too big or small to wear, you would...
This figure represents the pupillary distance.Repeat measuringthree to four times to guarantee an accurate measurement. Differences between singular and dual PD SINGLE PD, which can be either a distance PD or a near PD, is thepupillary distance between the centers of two pupils. Most prescription...
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 ...
Automatic, quick and accurate pupillary distance measurement on iPhone X+ devices. How to measure your PD: Look straight at the camera as taking a selfie, tap…