PD Measurement


The distance between the centers of your pupil we call it as PD. Your PD is an important part of your prescription because it shows exactly which part of the lens you look through to frame the right lens for your powerful sight. There is an old age saying and you may have heard about that “measure twice and cut once”. Usually, this concept was practiced by Scientists which they reframed the saying as: “measure 50 times, then calculate the average and determine the possible uncertainty.

We come across many scenarios that require main factors as precision in our day to day life. We may even do a loop process to get a precise result. Things are getting updates with new technology advancement and around 80% of all the manual tasks are automated to give accurate results in less amount of time. But still, a question is live. How much precise your result will be? The same theory applies to measure your PD distance. Whatever techniques or methods you use, after all the achieved result should satisfy a factor of 100% precision. We might not make 50 measurements in your everyday life, but you can still use the concepts of error, precision, accuracy, and uncertainty to save yourself time, energy, and trouble.

An average Pupillary Distance for Kids and Adults

• Most adults found to have pupillary distance between 55-65.

• Pupillary distance of kids ranges between 42-54.

Let’s see how to Measure Your Pupillary Distance

• Measure your pupillary distance by yourself just by holding a scale in millimeters on the bridge of your nose.
• If you have your friends or relatives nearby, let’s take their help. Make the person stand at an arm’s length when you do this.
• If you are alone and measuring this by yourself, then face the mirror and do it yourself. If you currently own a pair of prescription eyewear then you can draw dots on your glasses lenses with a highlighter at same location as your pupils and measure the distance between them.
• In case you are unable to get a proper reading on your own, don’t hesitate to visit an optometrist. Measuring PD for glasses is not very expensive or time consuming. Hence, the charges will be reasonable. You can also use mobile apps which allow you to measure your pupillary distance if in case you don’t have access to a PD stick or pupilometer. These days one can even measure pupillary distance through PD glasses measurement online videos and web applications.
• Measuring your naso-pupillar distance instead of the ordinary interpupillary distance is an important criteria at the moment of prescribing your eyeglasses This has to be taken care when you have high refractive defects or is going to use multifocal eye glasses or intraocular lenses. Most of the auto refractometers and phoropters do not measure this parameter eye by eye. 

For any kind of eye related issues or PD consultation, PupilsDistance.com is the right choice for your perfect need.