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Estimate your pupillary distance with AI pupil tracking and a real card calibration reference. Private, browser-based, and designed to flag low-confidence captures instead of overpromising precision.
Use a standard card reference and guided capture checks for a calibrated PD estimate.
Most prescriptions use Distance PD. Near PD is usually smaller because your eyes converge for close work.
Place a standard credit card on your forehead. This provides a reference scale for accurate measurement.
Use good lighting and take a clear photo facing the camera with the credit card visible.
Our AI analyzes the photo to detect your pupils and calculate your PD with high accuracy.
Pupillary distance (PD) is the distance between the centers of your pupils, measured in millimeters. This measurement is essential for properly aligning your glasses lenses with your eyes for optimal vision correction.
Standard ID-1 credit cards are exactly 85.60mm x 53.98mm worldwide. By including your credit card in the photo, our AI can calculate precise image scale and improve measurement accuracy.
Absolutely not. All image processing happens locally in your browser. Your photos are never uploaded to any server. Your privacy is our top priority. See our Privacy Policy for details.
The tool uses MediaPipe Face Mesh with iris landmarks plus a standard card reference. Accuracy depends on lighting, gaze, card visibility, head angle, camera quality, and repeated measurements, so the app shows a confidence score and asks you to retake poor captures. Verify with an optician for prescription glasses when possible.
The average adult PD ranges between 54-74mm, with most adults falling between 60-68mm. Children typically have smaller PD measurements. Your specific PD depends on your facial structure and is unique to you.