TTLENS CORPORATION
Measure your pupillary distance (PD) online with your camera. Fast, accurate and completely free.
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For near pupillary distance, follow “Distance”.
For far pupillary distance, look into the distance at least >5 m.
Place your face inside the frame
Estimated PD: — mm
Your pupillary distance
Pupillary distance (PD)
Re-measure recommended
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| Bridge DBL |
Frame size A |
PD A+DBL |
When to choose |
|---|
Frame PD = A + DBL (ISO 8624:2011). When Frame PD is close to your eye PD, optical center misalignment is small → less prism effect (Prentice’s Law).
Decentration ≈ (A + DBL − PD) / 2. Keep Frame PD within PD … PD+6 mm.
Bridge (DBL) is chosen by nose bridge height/width; lens width (A) by face width. Temple length is usually 135–145 mm.
References: ISO 8624, ANSI Z80.5, Zeiss / Essilor centration guides.
Upload a face photo with a ruler/frame reference. This feature is being improved — please use Live measurement for now.
Wear your current glasses in front of the camera. This feature is being improved.
