Pupillary distance is the space — measured in millimeters (mm) — from the center of one pupil to another. When you need glasses, an optometrist or an optician will measure this distance to make sure ...

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 ...

You've no doubt encountered a number of measuring tools in your lifetime. Common tools used for measuring range from the familiar 12-inch wooden ruler that we used in grade school to precision ...

Mobility. While grip strength isn't necessarily used when you're walking, it's associated with mobility. People with physical limitations are more likely to have decreased grip strength.‌ Overall ...

You would be wise to learn how to measure your ring size before purchasing your next piece of eye candy. Whether shopping in person or online, fine jewelry is usually a pretty major purchase—and you’d ...

Choosing to have a baby can be a magical experience. But there are also many unknowns that come with pregnancy. You’re doing everything you can to care for your body and your unborn child, but you may ...