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PD Meter: Pupillary Distance — App Store 排名

heekyung moon · Utilities · 在 App Store 查看

应用简介

开发者在美国 App Store 的完整简介（英文原文）。

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.

PD Meter: Pupillary Distance 不在我们每天抓取的免费榜前 100 名里。可以用下面的实时查询，立刻查看 12 个国家的情况。

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你的浏览器现在就去读取 Apple 的榜单，所以这是实时数据，不是昨天的抓取结果。