Try to keep the ruler still for the next step.
Move the ruler such that the “0” mark appears directly underneath the center of your left pupil. Close your right eye and look directly at your left eye.Stand in front of a mirror and hold a ruler up to your nose, such that the measuring edge runs directly underneath both your pupils.Our friend Oliver Kreylos offers these simple instructions, along with a more detailed breakdown. With a ruler and a mirror you can easily measure your IPD. Use a Mirror (accurate but you need a ruler)
Pupillary distance ruler drivers#
You’ll be asked to upload a photo of yourself holding any standard-sized magnetic strip card (ie: credit card or drivers license) which will be used to establish the correct scale for the measurement. This will work through your browser on your computer or smartphone. You can measure your IPD with a browser-based tool like this one from Ace & Tate.
If you’re younger than 20 and it’s been more than a year since you saw the eye-doctor, you may want to get a check-up to make sure you have an up-to-date measurement. If you’ve been to one since you’ve reached your adult size, your doctor should have an accurate measurement on file give them a call and ask if they can provide your IPD measurement in millimeters. The most accurate IPD measurement you’ll be able to get is from an eye-doctor. If you don’t have access to one of the above devices for an automatic measurement, here’s other ways you can measure your IPD. To calculate a near dual PD, subtract 1.5mm from each of the two measurements.Other Ways to Measure Your IPD Image courtesy Will Folsom ( CC BY 2.0) In order to arrive at your near PD measurement, you need to subtract 3mm from the regular PD measurement (known as a distance PD). So when you are calculating the distance between your pupils for the purposes of reading glasses (a measurement known as near PD), you need to adjust the figures. If you are looking at an object close up-for example, when you’re reading-your pupils tend to move closer together. How do you calculate near PD for reading glasses? Then your friend should read the measurement that lines up with the centre of your right pupil.Without moving the ruler, they must then open their left eye and close their right eye.Your friend should close their left eye and then use their right eye to line up the centre of your left pupil with the 0 mark on the ruler.Your friend should sit at the same level as you and hold a millimetre ruler across the bridge of your nose (making sure the measurement markings on the ruler are on the side closest to your eyes).Don’t feel like you can get an accurate reading by measuring yourself? Here’s how a friend can measure your PD. This measurement works out the same as from the middle of one pupil to the other. If you’re having trouble deciding where the centre of the pupil is, you can measure from the far-left edge of the iris (the coloured circle around the pupil) of one eye to the far-left edge of the iris of the other. Now read the millimetre measurement that lines up with the centre of your right pupil.
Without moving the ruler, close your left eye and open your right one.Line up the 0 mark of the ruler with the centre of your left pupil and keep your head still.Lay the ruler flat horizontally across the mirror in front of you and close your right eye.Stand facing a mirror, at a distance of about 20cm.
Pupillary distance ruler how to#
How to measure your own PD in 5 simple steps The first number of the dual PD measurement is always the right eye and the second is the left eye. Dual PD is a measurement that consists of two numbers: the distance between each of the pupils independently and the bridge of the nose. Single PD is the distance between the centres of the two pupils. People sometimes talk about two different types of PD measurement: single and dual PD. For optimal vision, it’s important that you are looking through the central part of the lens, so you need to make sure you measure pupillary distance accurately. Your PD measurement is used in the alignment of your glasses to make sure your pupils are lined up with the centre of each lens.
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