The importance of measuring your pupillary distance (PD) cannot be overstated when it comes to getting the perfect fit for your prescription glasses. Your PD is the distance in millimeters between the center of one pupil to the center of the other, and it plays a crucial role in ensuring optimal comfort and clarity when wearing glasses.


If your PD is not measured correctly, it can lead to eye strain, fatigue, and even difficulty seeing properly. This is especially true for individuals with higher prescriptions, as an incorrect PD can have a significant impact on their vision. Therefore, it is essential to measure your PD accurately to avoid these issues.


There are two types of pupillary distance measurements: single PD and dual PD. Single PD refers to the distance between the centers of the pupils, which can be either a distance PD or a near PD. Distance PD is used for ordering any type of prescription glasses except reading glasses. On the other hand, near PD is used specifically for ordering reading glasses.


Dual PD, also known as monocular PD, consists of two numbers and represents the distance between the centers of each pupil to the bridge of the nose. It is typically written in the format of 32/30, where the first number corresponds to the right eye (OD) measurement and the second number corresponds to the left eye (OS) measurement.


In conclusion, measuring your pupillary distance accurately is essential for ensuring a proper fit for your prescription glasses. Whether it is a single PD or a dual PD, getting the measurement right can make a significant difference in your comfort and vision when wearing glasses.

November 07, 2023 — Arnold Trent JR.