How to measure your Papillary distance (PD)

 

So, first thing’s first: what is papillary distance (PD)? Essentially, it’s the distance between the centers of your pupils (the black bits in the middle of the eyes). Your PD is an
important measurement when your glasses are being manufactured, to make sure you're
looking through the best spot in your lenses for clear vision.

If you don't have a copy of an accurate PD measurement from your optician, you could try to
measure this yourself, or have a friend help you out. We’ll talk you through how to do it here.

image15

1. Stand about 30 cm away from a mirror

3.Close your right eye, then line up the ruler so that 0 mm is in line with the middle your left pupil

2.Looking at yourself, hold a ruler up against your eyebrows

image16

2.Looking at yourself, hold a ruler up against your eyebrows

3.Close your right eye, then line up the ruler so that 0 mm is in line with the middle your left pupil

2.Looking at yourself, hold a ruler up against your eyebrows

image17

3.Close your right eye, then line up the ruler so that 0 mm is in line with the middle your left pupil

3.Close your right eye, then line up the ruler so that 0 mm is in line with the middle your left pupil

3.Close your right eye, then line up the ruler so that 0 mm is in line with the middle your left pupil

image18

4.Look straight ahead again and then open your right eye and close your left

5.Your papillary distance measurement will be the figure that lines up with the center of your right pupil

3.Close your right eye, then line up the ruler so that 0 mm is in line with the middle your left pupil

image19

5.Your papillary distance measurement will be the figure that lines up with the center of your right pupil

5.Your papillary distance measurement will be the figure that lines up with the center of your right pupil

5.Your papillary distance measurement will be the figure that lines up with the center of your right pupil

Measuring a friend’s papillary distance

To measure someone else’s PD, have them look at something around 20 feet away from them with both their eyes open. Using a ruler, line up the 0 mm mark with the center of one pupil, then measure to the center of the other.

You just need to make sure that you stay out of their line of sight, they keep looking straight ahead with their eyes as still as possible, and that they don’t look at you while you’re measuring.

Do this a few times to make sure the measurement you get is consistent. The average papillary distance for adults is usually between 54-74 mm.