The right pair of glasses should rest comfortably on the bridge of your nose, and should not press against your forehead or cheeks. But they shouldn't rest so far towards the end of your nose that they slip when you squint or wrinkle your nose. The nose fit determines how far your glasses should sit from your face, and a proper fit should allow for the lenses to lie between 14 and 24 millimeters from your eyes. Finding the right fit doesn't require magic, just the correct measurements. And once you have a good-fitting pair of eyeglasses that rest perfectly on your face, you can order future glasses with the same measurements and enjoy a reliable fit.
When you browse eyewear online, you'll notice eye, bridge, and temple measurements—what do these numbers mean? This is where to start when you're looking for the proper fit. When it comes to finding glasses that rest on your face properly, without pinching, slipping, or causing discomfort, the right frame measurements are imperative.
The two best ways to find your correct glasses measurements are to find the measurements printed on a comfortable pair you already own, or to try on a pair at a store and use those measurements to order new glasses. If you're currently wearing glasses, your frames will show the measurements, usually printed on the bridge or temple. The measurements that determine proper eyeglasses fit are printed next to each other—eye size, bridge size, and then temple size—and may be separated by a little square icon. If you're looking for new glasses, start with your comfortable, existing pair to figure out what size frames you need or, to measure your face to get the best fit.
Other fit indicators, including where your glasses line up with your eyebrows or whether your glasses touch your cheeks when you smile, don't matter as much as frame measurements, because they have less to do with the fit of your glasses and more to do with the shape of your frame or the nuances of your face. So if you're wondering whether your glasses should rest below your eyebrows or align with them, that variable is more a matter of style than the actual fit.
Let's break down each component of a frame's measurements to help you achieve a comfortable fit.
Your glasses should sit level across your face, with the bridge resting comfortably on your nose and each temple curving gently around your ear. Depending on the size of the rims, and your style preferences, your glasses may not cover your eyebrows, or extend to your cheeks—the most important thing is that they remain even as you move throughout the day.
Most eyeglasses discomfort can be traced to fit, and fixed with a few adjustments. It's best to have an optician adjust your glasses to prevent breaking them—but if you're careful you can make some minor adjustments yourself.
If you're new to wearing glasses, you may need a few days to become comfortable wearing your frames, as well as get used to your prescription. For the most comfortable glasses experience, have your new frames adjusted at an eye doctor's office and wear them when you're supposed to so you can adjust to the prescription.