How to Measure Your Pupillary Distance (PD)
What is Pupillary Distance?
Pupillary Distance (PD) is the measurement of the distance between the centers of your pupils. This measurement is REQUIRED and used to determine where your look through the lens of your glasses. This number should be as accurate as possible.
The average adults PD is usually between 50-75mm (millimeters); kids’ are usually between 42-57mm (millimeters).
Your eye doctor will usually measure your PD during an eye exam and provide it to you on your prescription for glasses. However, if it was not provided to you, or is missing from your prescription, use the 4 easy steps below to help you measure it yourself.
How to Measure Your Pupillary Distance (PD)?
STEP 1
Stand 8 inches away from your mirror and hold a ruler against your brow line near your eyes .
STEP 2
Close left eye, align the ruler’s 0 MM with the center of your right eye pupil.
STEP 3
Look straight ahead, then close your right eye and open your left eye.
STEP 4
The MM line on your ruler that lines up to the center of your left pupil is your PD.
Have a friend help you measure your PD!
If a friend or family member is measuring your PD, just follow the steps below!
- Keep both eyes open.
- Have your friend put the zero on the millimeter ruler over the center of one pupil, then measure the distance to the center of the other pupil.
Additional tips when a friend/family is measuring:
- Keep your eyes as still as possible, do not look around, just look straight ahead.
- Do not look at the person doing the measurement.
- Look above his/her head at something approximately 10 feet - 15 feet away.
Now that you have your PD and your prescription, you can shop at Looki for your new pair of glasses!