Be sure to look straight ahead while taking the measurement. You can also cut a piece of paper or cardboard and mark the center of your pupils, then measure that distance if you are having trouble using a ruler and mirror.
A study showed that some websites offer technology that will measure your PD for you. There are apps or programs to take a photo of your face and measure your PD that way. There are a few specifics when it comes to how your pupillary distance is measured.
Your gaze naturally shifts inward or outward depending on whether you are looking at things close up or far away. For this reason, Eye Influence says that your optometrist or an optician may measure two types of PD — far and near. Eye Influence also says that your measurement may change based on what types of eyeglasses you need. Your optometrist or optician will know that your pupillary distance needs to be measured differently. If you are ordering eyeglasses online, you should be asked for additional measurements based on your prescription.
Your eye examination will be performed by an optometrist in most cases, and your PD may be measured by an optician — the provider that creates the right eyeglasses to fit your prescription.
Measuring PD is especially important when you need multifocal lenses like bifocals. In this case, you may also need to measure vertical distances and more to find the right fit. In many cases, the measurements needed to ensure the right fit for your eyeglasses are set by the manufacturer of those lenses.
When you are ready for a new pair of glasses, you or the provider who is creating your eyeglasses, will take several measurements to make sure the fit and function are appropriate for your needs.
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If using a mirror, try to look straight ahead and into the distance as you measure. If a friend is taking your measurements, try to look past them straight ahead into the distance to avoid the result being too narrow.
Rest the ruler against the bridge of your nose and line up the middle of your left pupil with the zero line on the ruler. You can now measure the distance between your pupils. Measure across to the middle of your right pupil, still looking into the distance.
The average PD for adult women ranges from 46mm to 65mm; adult men ranges from 59mm to 74mm. Repeat these steps two to three times to get a consistent number. Also the higher your prescription, the bigger the effect an incorrect PD can have. So now that you are a PD pro, get measuring!
Use our online tool below or when you're entering your prescription during the checkout process when you're adding your script for the quickest way to figure out your PD. Get your laptop or phone camera ready and follow these instructions:. Hold the card by its top corner and hold it flat on your forehead. We might ask you to make small adjustments. Once you have done this, you'll have your PD. Make sure to write it down to enter it with you prescription details at the checkout.
Whilst the distance between your pupils is one length, you'll have to halve it to work out the PD for each eye , e. If you can't halve your PD to a round number, no problem - split them to the closest 0. We see this quite a bit so, don't worry, we know how to deal with it.
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