Stand 8 in. away from a mirror. Hold a ruler against your brow.
Close your right eye then align the ruler’s 0 mm with the center of your left pupil.
Look straight then close your left eye and open your right eye.
The mm line that lines up to the center of your right pupil …
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Have you ever wondered why glasses cost so much? When you buy glasses from a traditional brick-and-mortar retailer, you’re not just paying for the frame and lenses; you’re also paying big money to cover the retailer’s hefty outsourcing costs, which usually include manufacturing…
Pupillary distance (PD) measures the space between the pupils of your eyes. Knowing this measurement is important to make sure your eyes match up with the optical center of your lenses. The average adult’s PD is between 54-74; kids' are between 43-54.