![]() If your current prescription doesn’t already include your PD, there are a few options for getting it. ![]() It’s more accurate since people don’t always have a symmetrical face. Your pupillary distance can be measured in two ways: as a single value (binocular), or as two separate measurements for each eye (monocular or dual PD).Ī binocular PD is simply the distance between your pupils when looking straight ahead and is expressed as a single number (for ex: “60”).ĭual PD measures each eye separately and is typically written as “30/32” (for example), where the first number represents the distance between your right eye to your nose bridge, and the second the distance from your left. ![]() If you’ve tried ordering prescription glasses online, you may encounter the option to input your PD as a single numerical value, or as two separate measurements. A PD that’s even a single millimeter off can cause headaches, dizziness, and distorted or blurry vision. If you have a strong prescription, however, or if you have astigmatism, having a precisely measured PD is key to getting the clearest vision possible and avoiding discomfort. Up to a couple of millimeters off will not be too noticeable, as it’s about a 1mm discrepancy for each eye. less than -2.00), you can tolerate a small discrepancy in your PD. Generally speaking, if your distance prescription power is low (i.e. Near PD is around 3mm less than your far PD. You’ll want your near PD for reading glasses and your far PD for glasses that help you view things clearly in the distance. Thus, your PD might vary depending on whether you wear glasses for reading or distance-viewing. It changes based on the distance between you and the object you’re looking at: If you’re looking at something close up, your pupils move closer to each other, resulting in a smaller PD measurement than if you’re looking at something far away. In actuality, your PD isn’t a static number either. ![]() Men also typically have a higher PD than women. According to Rx Safety, the average pupillary distance for an adult ranges between 54-68mm, while children usually fall between 41-55mm. It is highly recommended to get your PD from your optometrist if you have a high power or if you are going to order bifocal, progressive or computer lenses.Now that you know what pupillary distance is, you might be wondering what a “normal” PD measurement is. In such cases the first value is for Distance PD and the other value 61 is near PD. At times you will find PD written as 63/61. In most cases, PD value ranges from 57 to 65 mm, with the most common one being 63 mm. That distance will be your PD.Ħ - Repeat this process a couple of times to ensure you have an accurate measurement. Steps To Measuring Your PD Yourself:ġ - Start with a straight “mm” ruler, a pencil or pen and a mirror.Ģ - While looking straight in the mirror, place the ruler on the bridge of your nose.ģ - Make sure that the start of the ruler is directly below the center of one eye’s pupil.Ĥ - Hold the ruler (keeping it steady and parallel to the floor) mark the location on the ruler of the other eye’sĥ - Measure the distance in millimeters between the two marks. The Pupillary Distance (PD) ensures RX glasses possess the right alignment. However with deprivation – our eyesight absorbs erroneous frequencies. In addition – experts recommend measuring our PD with laser- focus to keep vision intact and bonded. Without PD – it is impossible to purchase an accurate pair of glasses as it pronounces the optical center of both pupils. Getting our PD measured is now an imperative milestone as through this - opticians add precision spots on the lenses and adjust it with our frame. Pupillary Distance or better yet - PD – highlights the distance that originates from the center of one pupil and stretches to another one.
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