Frame eye size, width, bridge contour, temple length andĪs a PD measurement is not part of the optical prescription, some offices do charge a fee for this supplementary test, but should notify you before hand.Base curve (curvature on the front surface of the lens).Wrap angle (the amount the frame is curved towards your face).Pantoscopic tilt (the amount of tilt on the front of the frame).Knowing this measurement is important to make sure your eyes match up with the. Vertex distance (distance between the frame and the cornea) Pupil distance (PD) measures the space between the pupils of your eyes.Segment or OC height (determines where the lens will be positioned in the frame).
Hold the center of the special ruler straight over the bridge of your nose. 2 Have your friend stand approximately 8 inches away or more. For greatest comfort and clarity, the optical center of each lens of your glasses should be aligned directly in front of the center of your pupil. It is an essential measurement when buying a new pair of eyeglasses or prescription sunglasses.
PUPIL DISTANCE MEASUREMENT LICENSE
Ensure it's scaled properly by comparing your Driver's License against the key. Pupillary distance (PD) is the distance between the pupils of your two eyes. Watch the video below for more information on pupil distance measurements and other prescriptive lens measurement information.Ī PD is also only one component of many measurements that are required during the proper fitting of a pair 1 Print our tip sheet, which includes a special ruler to measure your PD. Otherwise, it is measured by the optician. This is where you get your clearest, sharpest. Pupillary distance is sometimes measured by the optometrist during your eye exam. The PD will differ depending on the purpose of the glasses and the type of lenses.įor example, a set of reading glasses will require a different PD measurement than a pair of driving glasses or a pair of computer glasses. The pupillary distance (PD) of the eyes is measured in order for your lenses to have an optical center (OC).
A PD should be performed during the fitting of the eyeglasses by an optical dispenser. Pupillary distance is essential for crafting prescription glasses because it helps us know where to place the center of your vision on your lenses. Before using our PD tool, review the steps below. Pupillary distance, sometimes referred to as pupil distance or just PD, is the distance between the center of each pupil and the bridge of your nose measured in millimeters. While a PD measurement can be performed during your visit to the optometrist’s office, it is not part of the prescription as it has no clinical relevance. PD is the distance between your pupils, and its used to help center a prescription correctly in your frames. “PD” stands for pupillary distance, or the distance between the eyes. The PD will differ depending on the purpose of the glasses and the type. Single or binocular PD measurement refers to the distance between the center of one pupil and the. A PD should be performed during the fitting of the eyeglasses by an optical dispenser. With the presence of online ordering, many patients are asking optometrists for a PD measurement. There are two types of PD measurements: single PD and dual PD.