Measure Ypur PD
What is
PUPILLARY DISTANCE?

Your PD is the distance between the centre of each of your pupils. It is measured when you are looking straight ohead. This measurement helps to ensure that your prescription is property centered for the Georest and most accurate vision.

Why is PD important and how does it affect your glasses?

Your pupillary distance measurement is an important part of your eyeglasses prescription. It ensures the correct placement of your lenses on your frames, which is a determining factor for your eyesight and health.

Single PD or dual PD

There are two primary methods for PD measurement: single PD and dual PD.

Single PD (or binocular PD) is the measurement from pupil to pupil between each eye.

Dual PD (or monocular PD) is the measurement from your nose bridge to each eye.

Dual PD is believed to be the most accurate since many people may find their nose-to-pupil measurement is not equidistont on both sides.

PD is especially critical when fitting glasses with progressive lenses, which requires precise lens-to-pupil alignment to ensure comfortable vision at all distances.

3 ways to measure your PUPILLARY DISTANCE

Using a Ruler

Ruler

Instructions

  1. Stand about 8" from a well-lit mirror.
  2. Close your right eye.
  3. Align a ruler to your left pupil across your brow.
  4. Open your right eye.
  5. Measure the distance to your right pupil.
Download Vint & York PD Ruler

Tips

  1. Ruler measurements are in milimeters.
  2. Repeat this exercise 2-3 times for best accuracy.
  3. Hold still, the more still your eyes are, the result is more accurate.

What's needed:

  • MirrorMirror
  • RulerRuler
  • PencilPencil

Using your Eyeglasses

Ruler

Instructions

  1. Put on glasses. Have a felt tip marker handy!
  2. Focus on an object at least 20 feet away.
  3. Mark on your right lens directly over the object.
  4. Mark over the object on your left lens.
  5. With both eyes, make sure the markings overlap into a single dot.
  6. Measure the distance between the two dots with a milimeter ruler.

Tips

  1. Ruler measurements are in milimeters.
  2. Repeat this exercise 2-3 times for best accuracy.
  3. Hold still, the more still your eyes are, the result is more accurate.
  4. If measuring for near-sighted glasses, focus on a close object like reading material or computer screen.

What's needed:

  • EyeglassesEyeglasses
  • RulerRuler
  • PencilPencil

Get Help from a friend

Get help from a friend

Instructions

  1. Face your friend and look straight ahead with both eyes open.
  2. Have your friend hold the ruler up to your right so the zero end lines up with your pupil. Measure the distance from your right to your left pupil. The number that lines up with your left pupil is your PD. Jot it down.
  3. Have your friend repeat the process on your left eye by measuring the distance from your left pupil to your right. Use the number that lines up with your right pupil. That's your PD. Jot it down.

Tips

  1. Ruler measurements are in milimeters.
  2. Repeat this exercise 2-3 times for best accuracy.
  3. Hold still, the more still your eyes are, the result is more accurate.

What's needed:

  • FriendFriend
  • RulerRuler
  • PencilPencil
  • PaperPaper

How Do You Calculate Near PD For Reading Glasses?

You can calculate Near PD for reading glasses by subtracting 3mm from your distance PD For example, if your distance PD is 63mm, then your near PD is 60mm.
If you are using Dual PD to calculate near PD, then subtract 15mm from each eye's measurement. For example, if your dual PD is 33/31mm then your near PD would be 31.5/29.5mm.

Average pupillary distance for

FEMALES

46mm to 65mm

MALES

59mm to 74mm