Remember, the PD range of an adult is between 54 – 75 mm while a child’s PD can range anywhere from 43 – 58 mm. Make sure to write down that number! You’ll want to perform this process 3 or 4 times to ensure that the number is correct and accurate. That’s how you measure your pupillary distance. Step 3: Now, with your right eye open, you should be able to see the number on the ruler that lines up to the center of your right pupil. While keeping your eyes dead straight, open your right eye and shut your left eye. Step 2: Next, keep your right eye shut, and line up the beginning or ‘zero’ of the ruler to the center of your left pupil. With your face straight and staring ahead, hold the ruler up against your brow over the bridge of your nose. Step 1: With your ruler in hand, stand about 8 inches away from a well-lit mirror. A ruler (preferably one with millimeters).To measure your PD manually, you’ll need 2 things: If you can’t find your PD on your prescription (or if you can’t find your prescription!), it’s very easy to measure your PD from home. How to measure your PD yourself in 3 easy steps In such cases, providing a dual PD measurement is the best way to ensure your eyeglasses fit your face perfectly. Some people may have one pupil that’s slightly further away from the bridge of their nose than the other pupil – for example, due to the proportions of their face, or from a condition such as an eye turn. This is because our eyes are often not perfectly symmetrical on our faces. It’s also entirely possible to have different PD measurements for each eye. For example, instead of saying your PD is 65, your prescription may say: In some instances, you might come across OD and OS, which just also means Right Eye and Left eye. Dual PD will have a set of numbers for each eye, which is typically marked as ‘right’ and ‘left’. In this case, the optometrist/ophthalmologist you visited uses Dual PD, which means the Pupillary distance was measured from the center of each pupil, to the center of your nose. However, in some cases, 2 sets of numbers are given. Typically a PD reading consists of just 1 set of numbers. Look for the number next to the letters ‘PD’ Here are the 3 easiest ways to get your PD: So now you know what a PD is, let’s find yours. Of course, this means that your PD needs to be as accurate as possible as getting the PD wrong can cause eye strain or headaches. ![]() We use this to align your prescription right in front of your pupils, which ensures your vision is clear and optimally corrected. PD helps glasses providers determine the ‘ideal spot’ for your eyes to look through in your glasses. ![]() Knowing your PD is really important, as you’ll need it to ensure you’ll be able to see comfortably out of your brand new glasses. However – everyone’s face is different! For instance, research suggests that males typically have a slightly higher PD than females. ![]() To give you a rough idea, the Pupillary distance of an average adult is between 54-74 mm whilst children often have PD readings between 43-58 mm. Makes sense, right? PD is usually measured in millimeters. Simply put, your Pupillary Distance is the distance between the center of your left pupil to the center of your right pupil. We’ll explain in this article what a PD is and how to easily measure it for yourself from home. You can usually find your PD on your official eyewear prescription, but if you’ve misplaced it – don’t worry. Dubbed ‘PD’ for short, Pupillary Distance is a very important measurement that you’ll need to provide any eyewear provider whenever you order new glasses. Ordering a new shiny pair of glasses? Great! Then you’re going to need your Pupillary Distance to make sure that your new specs fit your face perfectly. Want to measure your PD yourself? Download and print our free PD ruler!
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