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 ...

Pupillary distance helps center your eyeglasses prescription. Your eyeglasses provider normally measures it for you, but you won’t find it on your prescription. If you order glasses online, you’ll ...

A person can measure their height at home by using an object, such as a pencil, to mark a wall and measure the distance. However, it is often easier to measure height with help from another person.

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Fractions: If you’ve ever had difficulty with fractions, using a tape measure just ...