What if my eye prescription does not have a PD?

If your PD is off, the “optical center” of your lenses will be, too, and your glasses won’t be as effective as they should be. Lots of optometrists will give you a copy of your prescription but not include your PD. That’s because they know that, armed with both, you can order your glasses online.

Why do doctors not have pupillary distance?

Typically when glasses are ordered by an optician, the measurement is taken very accurately with a pupillometer. Because if the measurement is off, even by a little bit, it can cause blurry vision, eyestrain, and headaches. Chances are your PD exists on file already at your optometrists office.

Does pupillary distance change with prescription?

Pupillary distance is measured in millimetres, and is sometimes expressed as ‘PD’ on your prescription. Your pupillary distance can change during childhood and adolescence, but will almost certainly remain the same once you reach adulthood.

Why is my pupillary distance 2 numbers?

Your Numbers The first number, which is always higher, is for distance, and the second number, which is always lower, is for near-vision reading only. Another example is if your numbers are 34.5/33.5, then it means your PD was taken one eye at a time.

Do I use Dist PD or near PD when ordering glasses?

Always enter your “Far PD” for distance vision eyeglasses and enter your “Near PD” for your reading glasses only. For most people, the difference between Far PD and Near PD is about 2-3mm.

Does PD need to be exact?

Your PD should be exact. If your lenses aren’t centered correctly, they can cause discomfort and eye strain. A small margin of error might not cause problems, but it’s better to be as accurate as possible.

Do you add the two PD numbers?

Added together, these numbers should equal the full distance measured between your two pupils. Dual PD is required for reading glasses, but not usually necessary otherwise. Two high numbers (e.g. 62/59): This is used only for reading glasses. The first number is your Distance PD and the second number is your Near PD.

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.

Should I use single 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.

Is 70 a normal PD for glasses?

The average adult PD range is between 54-74 mm. The average child PD range is between 43-58 mm. A dual PD is provided with two numbers and represents the measurement of each pupil center to the center of the bridge of your nose in millimeters.

What does PD mean on a prescription?

PD, or pupillary distance, refers to the distance in millimeters between the center of one pupil to the center of the other. Having a correct PD on your glasses prescription insures that you are looking through the ideal spot in your lenses.

How important is pupillary distance?

Pupillary distance is the distance between the centers of the pupils of the eyes. This value is typically given in millimeters because they are a precise system of measurement which are useful for very small measurements. The pupillary distance becomes especially relevant for eyeglasses prescriptions,…

What is the pupillary distance?

Pupillary distance. Jump to navigation Jump to search. Pupillary distance (PD) or interpupillary distance (IPD) is the distance measured in millimeters between the centers of the pupils of the eyes.