PD Meter vs PD Meter

MEIDAI Interpupillometer is the world's first app which using AI technology for binocular interpupillary measurement. Using it can avoid the risk that traditional handheld interpupillometers requiring doctors and users facing each other in a extreme close distance (approximately 20cm). [Accuracy] 0.1mm [Result error] 0.3-0.5mm [Tips for use] For FPD measurement, focus at least 4 meters away. For NPD measurement, please follow the "distance reminder". [Steps] (1) Adjusting the face to the camera (2) Keep your face steady when prompted (3) Focus distance required to adjust sight * Use interpupillary distance for distance, look beyond the "tip arrow" to see the distance * Close to interpupillary distance, focus on "tip arrow" camera (4)) Click [Measure] to get interpupillary results (5) The errors in AI's pupil recognition can be corrected manually. For further technical support from professional organizations, please contact us: WeChat: 13957778558 Email: support@meidaitech.com Official Website: https://www.meidaitech.com

Ordering glasses online and need your PD? PD Meter helps you measure your pupillary distance (PD) in millimeters using a front-camera selfie and any standard-size card, like a credit card, for scale — no ruler, no second person, no trip to the optician. Your pupillary distance is the gap between the centers of your pupils. Online eyewear stores ask for it so your lenses are centered correctly in the frame. PD Meter gives you a quick, repeatable estimate from the comfort of your home. HOW IT WORKS • Hold a standard card (a credit card, ID or any ISO-size card) under your eyes — its known width gives the app a real-world scale. • Take a front-camera selfie, looking straight at the lens. • Mark the center of each pupil and the edges of the card. • PD Meter converts pixels to millimeters and shows your PD instantly. WHAT YOU GET • PD in millimeters, ready to enter at checkout. • Single (binocular) PD, the value most retailers request. • A clear, guided flow with on-screen tips for good lighting and head position. • Re-measure as many times as you like and average your results for confidence. WHO IT'S FOR Anyone buying prescription or blue-light glasses online, parents checking a child's fit, or anyone who simply wants their PD on hand without booking an appointment. A NOTE ON ACCURACY PD Meter provides an estimate based on your photo and the card scale. Results depend on lighting, camera angle and how precisely you place the markers. For high prescriptions or progressive lenses, confirm your PD with an optician. This app is not a medical device.