All you need is a millimeter ruler and a mirror. You need your PD measurement for that.ĭon’t worry. An optician typically will measure your PDs with a high-precision measuring device called a pupillometer.īut let’s say you have your eyeglass prescription and want to buy a stylish pair of eyeglasses online. PD measurement is used to make sure your lenses are optically centered, and it determines. Pupillary distance measurements usually are taken when you are being fitted for glasses after your eye exam. 1 Ranked App for measuring Pupillary Distance. PD is the distance in millimeters between the centers of your pupils. But the sum of your two monocular PD measurements should always equal your binocular pupillary distance. This is the distance between the center of the pupil of one eye and the center of the pupil of the other eye.ĭue to facial asymmetry, monocular PDs aren’t always exactly the same. Monocular PDs are required for accurate fitting of progressive lenses.īinocular PD. You can measure your PD with a pupillary distance ruler ( PD Ruler) or a millimeter ruler. This is the distance between the center of your pupil and the middle of the bridge of your nose. There are two types of pupillary distance measurements: The average pupillary distance for an adult is about 63 mm, but this is not a number you’ll want to assume. Pupillary distance can vary widely - roughly between 51 mm and 74.5 mm for women and 53 mm and 77 mm for men. 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. For most people, the difference between Far PD and Near PD is about 2-3mm.Pupillary distance (PD) is the distance between the pupils of your two eyes. For reading glasses, doctors measure your 'Near PD' or '59' in the example.Īlways enter your 'Far PD' for distance vision eyeglasses and enter your 'Near PD' for your reading glasses only. Your PD is usually measured for distance vision, which is 'Far PD', or '62' in this example. ▪ Sometimes PD is written as '62/59' or they are labeled 'Far' and 'Near'. A Monocular OD is written as two numbers, for example, '32/30', and '32' represents the PD for the right eye and '30' for the left eye. ▪ PD (OD), means the Monocular PD for the right eye, and PD (OS), means the Monocular PD for the left eye. ▪ PD (OU), written as '64', means Binocular PD which is for both eyes. For those requiring progressive lenses, we strongly recommend you get this information from your optician to ensure the accuracy of your glasses. Step4. You also need to measure the distance from two pupils to the center of the nose respectively to make sure that you have two PDs(OD & OS).ġ. Step3. Close your left eye and note the reading directly over your right pupil. Step2. Close your right eye and align the 0 mm over the center of your left pupil. Step1. Position yourself arm’s length from your friend or yourself approximately 8 inches (20cm) away from a mirror. Please measure your PD 2-3 times to ensure you get accurate results. Might be a bit different compared to practical measurements. Note: The average PD is between 54 and 78mm. Recommend to use a physical PD ruler or consult your ophthalmologist.ĭownload Zeelool’s PD ruler Note: Please Printed on A4. Take a look around and youll notice that no two. Use the PD ruler at the bottom of the page. Simple: your PD, or pupillary distance, is how much space you can find between the centers of your two pupils.

Print this page on A4 (without scaling, at 100%. The PD is needed to manufacture your eyeglasses because it determines the exact optical center of the lens, which is the point where you look through the lens. Pupillary Distance (PD) is the distance, in millimeters, between the center of one pupil to the center of the other.

Pupil distance for glasses