Measure Pupillary Distance (PD) Online
PD, or pupillary distance, measures the space between the pupils. One-click measurement of pupils' distance.
What Is Pupillary Distance?
Pupillary distance (PD) is the measurement of the space between the centers of your pupils. It’s an important factor in ensuring your prescription lenses are properly aligned within your frames, helping you achieve clear and comfortable vision.
Why is PD important? When lenses are correctly positioned based on the customer's PD, it allows the customer to experience optimal clarity and reduces eye strain.
What Is Single PD?
What Is Single PD?
Single pupillary distance (SPD) refers to the measurement between the centers of your two pupils, typically recorded in millimeters (mm).
What Is Dual PD?
What Is Dual PD?
Double pupillary distance (PD) measures the distance from the center of one pupil to the center of the other. This results in two values: PD for the left eye and PD for the right eye.
Key Features of the Online PD Measuring Tool
No Need to Align Cards – Zero Hassle Measurement
No Need to Align Cards – Zero Hassle Measurement
Many pupillary distance measurement tools on the market require consumers to align their head with a card or slowly turn their head to find the correct position for measurement.
Perfect Corp. offers a convenient and accurate measurement service. After numerous AI model training sessions, we have developed a solution that requires no extra tools—just open the camera on phone or desktop, and it can automatically measure the consumer's pupillary distance.
One Click Measurement
One Click Measurement
Truly achieve one-click pupillary distance measurement. After multiple field tests, the AI tool can measure pupillary distance in just seconds, giving consumers more time to browse glasses and increasing purchase rates.
Seamlessly Integration for Your e-Commerce Platforms
Seamlessly Integration for Your e-Commerce Platforms
Whether you're running an official e-commerce site, a mobile interface, or even a small e-commerce platform, you can seamlessly integrate AI products.
Want to try it out first? No problem at all—enjoy a 30-day free trial and pay only if you're satisfied!
Measure Pupillary Distance (PD) Online FAQs
Can I measure pupillary distance online?
Of course! Just open the camera, and the Online Measurement Tool will accurately measure your pupillary distance within seconds.
Can I measure my PD with my phone?
Yes, the Online PD Measurement Tool can be used on both mobile and desktop, anytime and anywhere.
Is it okay if your PD is off by 1mm?
A 1mm difference in PD is usually not a big issue for most single-vision glasses. However, for higher prescriptions or progressive lenses, even small inaccuracies can affect clarity and comfort—so it’s best to be as precise as possible.
How accurate are online PD measurements?
Modern online PD tools, especially those using AI and camera-based technology, can be highly accurate—often within 1–2mm of professional measurements. For everyday glasses, they’re a reliable and convenient solution.
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