if you have ordered prescription eyewear
online you may have asked yourself what is my PD and how do I measure it? You can
normally find your pupillary distance on your prescription but if it’s missing we
can help. PD is the distance, in millimeters, from the center of one pupil to the other. your PD is an important factor in ensuring that the center of
each lens goes directly over your pupils. for people with high-powered lenses this
is especially important. if your prescription includes your pupillary
distance they will normally be listed as one number, 64 for example. If there is a
difference in measurement between the bridge of your nose and the center of
each eye you may also see your PD as two numbers like 32 and 31. This is your PD
separated for each eye. Thankfully, measuring your PD can be easily done at home. Especially with a friend. First things first, take our downloadable PD ruler. I’m using this and a friend to measure her
far distance. Fold to the side that says using a friend. Have your friend sit down
and focus on something 10 to 20 feet straight ahead to help keep their eyes steady. Place the PD ruler against their forehead and align 0 with the center of their right pupil. Cover your left eye and read the
measurements. The number directly over the center of their left pupil is their
PD. Repeat this a few times to make sure the reading is accurate and consistent.
It is also very simple to measure your PD by yourself. All you need is your PD
ruler and a mirror. Stand about 8 inches or 20 centimeters away from your mirror.
Hold the PD ruler over your eyes centering the 0 over your left pupil. Once
centered, cover your left eye. the number directly over your right pupil is your PD. If you’re ordering single vision lenses
your journey ends here, but if you’re looking at progressives or bifocals
you’ll need your near distance as well. Use a friend for the most accurate
reading. You will follow the same instructions as before but instead of
focusing on an object 10 to 20 feet away have your friend hold a pen between you
and them. Once they’re eyes are focused on the pen you can read their PD.
Normal PD measurements range between 57 and 72 millimeters with the average
falling at about 63. For additional information check out our guides on EyeBuyDirect.com. See you there!