About Your PD – How to Measure it Yourself
The PD (Pupil Distance) is a required measurement needed to fill your glasses prescription. Note: If you’ll leave the PD measurement blank, one of our opticians will reach out to you to for further assistance.
What is the PD?
The PD is the distance between your pupils, using millimeters as the unit of measure. The average ranges between 54-74. Some doctors may write it on the prescription. You can ask your eye doctor or local optician to measure it for you. They use a device that instantly gives them the PD.
If Your PD is two Numbers:
If the numbers are two higher digits like 62/58, then the first number is your Distance (Far) PD used for making distance glasses and the second is your Near PD used for making reading glasses. If the numbers are two lower digits like 29.5/32.5, then just add them together for the Distance P.D.
If Your PD is one Low Digit Number:
If the number is one low digit, like 33; just add them together for your Distance PD.
You can measure your PD on your own, using one of the following ways:
Option 1: You will need a friend and a ruler. With a friend sitting opposite you at the same height, ask them to place the ruler across the bridge of your nose, with the millimeters side facing upwards. Your friend should move the ruler, so that the zero value is in the center of your right pupil. Your friend should now read off the measurement to the center of your left pupil. Bingo! That’s your PD.
Option 2: You will need your glasses, a friend, a ruler, and a non-permanent marker. Put your glasses on so they are comfortable and steady. Ask your friend to stand opposite you and have her mark a dot on each of your lenses, exactly where the pupils are positioned. Take off your glasses, and with a ruler, measure the distance between the two dots. That’s your PD! Don’t forget to thank your friend.
Option 3: Do it yourself! You’ll need a webcam, credit card (We use a credit card because a credit card is a universal size and that helps us to configure the proportion of the image).
Robin Meierhoff –
I thought it would be a pain, but ordering a prescription mask for my daughter was nothing but positive. I called with questions, and was given very helpful and useful information. Mask arrived in a timely manner, and was perfect. My daughter was able to enjoy an awesome day of snorkeling, and SEE at the same time!
Bradley Wells –
Love my custom mask! Everything is super sharp. Definitely made my trip to the Bahamas perfect! Thanks a ton.
Ibrahim Onur Birinci –
I have the bifocal lenses in a Tusa mask. I can finally see my gauge! I even started using my underwater camera again. This mask changed my diving experience overnight. Thank you!
Calvin T. (verified owner) –
I haven’t had time to go diving with the mask yet. But it looks like it will work out just fine
Peter Ian Limas –
Made a mask a few years back and was very rewarding. Am makin another with a newer prescription and a larger reading area for photography. Am expecting it to be as rewarding as the previous one. Thank you
Peter Ian Limas –
Had one made a couple of years back. Am still boasting it in front of my friends. Doing more photography now, and so turning back to have another made which will make my photography work so much more fun, am convinced
Ingrid J Hansen –
Excellent customer service!
Phil Wilson (verified owner) –
Last December I decided to order a prescription lens dive mask. Like most of us I googled to look for suppliers.
The first couple of contacts were more interested in my credit card info than my eyesight! I have an odd prescription which one of the companies said was impossible to put in a dive mask. I was very disappointed, until I managed to talk to Linda. She assured me they could take care of me. I had a terrific conversation with her (none of which involved my credit card number!) and after thoroughly going through what I needed I decided to get a new mask with my prescription lenses. My shipping details were a little complicated, but Linda assured me they could take care of it. So I placed the order. The order took a little bit longer than expected, but in the middle of this pandemic we all need to cool our anger and cut businesses some slack! The mask got to my destination and when I first tried it on I could see better than using my glasses! I am absolutely thrilled! The quality and workmanship on my mask is stellar! I’m back snorkelling again and continue to be amazed how this mask has opened up my underwater experience! Many thanks!
Stephen Roth –
Can’t figure out which is more spectacular – the customer service or quality of the work. Complicated after cataract prescription turned into a superb dive mask! Thank you