A single PD would be provided by one number and is the measurement of the center of one pupil to the center of the other. ... A dual PD would be provided with two numbers and would appear and is the measurement of each pupil center to the center of the bridge of the nose, in millimeters.
Should I use single PD or dual PD?
Single PD is the total distance between the center of both pupils. We recommend measuring dual PD. This is why: Dual PD is believed to be the most accurate since many people have different distances between their nose and pupil on each eye.
What does it mean to have two PD numbers?
If there are two PD numbers on your prescription, your PD was taken monocularly, meaning one eye at a time . Let's say your numbers are 33.5/32.5. The first number is for your right eye (OD); the second is for your left eye (OS). Add these two numbers together and enter the total (ie. 33.5 + 32.5 = 66 PD)2018-09-27
Why do I have a dual PD?
One pupil could be a little further away from the bridge of your nose than the other pupil. Because of this, a dual PD is usually recommended. When you have each pupil-to-nose bridge measured individually, you'll be sure to get your prescription right where you need them to be on your lenses.2021-05-17
How do I know if my pupillary distance is single or dual?
A 'dual' pupillary distance number is the distance in millimeters from each eye's pupil to the center of your nose. A single PD will be just one number, while a dual PD will have a number for each eye, marked 'right' and 'left'. (Some prescriptions may have 'OD' for the 'right' eye, and 'OS' for 'left' eye.)2020-05-13
What happens if you have 2 PD numbers?
If your PD has two numbers, do not worry, as it is very simple to figure out. If the two numbers are the same, add them together to get your PD number. If the two numbers are different, the higher number of for distance and the lower number is for near vision.2021-01-07
What is a normal PD for glasses?
The average PD measurements for women is 62mm and for men 64mm. Between 58 and 68 is quite normal though. We do encourage you to ask your optician for your PD measurement.
How do I know if I have single PD or dual PD?
A single PD would be provided by one number and is the measurement of the center of one pupil to the center of the other. ... A dual PD would be provided with two numbers and would appear and is the measurement of each pupil center to the center of the bridge of the nose, in millimeters.