PD (Pupillary Distance) Measurement Online
Step 1 of 4: Upload Photo
Photo Instructions
- • Hold the credit card directly under your nose, parallel to your eyes
- • The credit card should be at the same distance from the camera as your face
- • Look straight at the camera, keeping your head level
- • Ensure even lighting with no glare
- • Remove glasses if wearing
- • Take photo from 40-50cm (arm's length) away
❌ Don't:
- • Hold the reference object at an angle
- • Place it too far from your face
- • Cover part of your face with the object
- • Take photo from the side
- • Use in poor lighting conditions
✅ Do:
- • Keep the reference object perfectly horizontal
- • Align it with your eye level
- • Ensure your face is clearly visible
- • Take photo straight-on
- • Use good, even lighting
Frequently Asked Questions (FAQ)
What is Pupillary Distance (PD)?
Pupillary Distance (PD) is the distance in millimeters between the centers of your pupils. It is essential for accurately positioning lenses in your glasses.
How do I measure PD online with this app?
Simply upload a photo with a reference object (credit card, dollar bill, ruler, or A4 paper) held below your nose. Then, mark your pupils and the reference object's edges to calculate your PD.
What objects can I use as a reference?
You can use a credit card, dollar bill, 6-inch ruler, or A4 paper as a reference for scale. The app uses this object to convert pixel distance into millimeters.
Do I need a ruler or any tools?
No! You only need your phone or computer camera and a common object like a card or paper for scale. No physical ruler required.
Can I use this for ordering prescription glasses?
Absolutely. The PD value measured here is suitable for use when ordering glasses online from most optical retailers.
Is it free to use?
Yes, our PD measurement tool is 100% free to use, with no hidden costs.