The pupillary distance (PD) measurement is a requirement for people who want to purchase eyeglasses. Here, find out how to measure your PD using a mirror and a ruler. Share on Pinterest Some eyewear ...
iOS: Sometimes you need to get a quick measurement of something and you probably don’t carry a ruler around, but of course, there’s an app for that. VisualRuler gives you a decent estimate of an ...
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