PUPILLARY DISTANCE

PUPILLARY DISTANCE or PD is the distance measured in millimeters between the centers of each pupil. This measurement is critical when ordering your custom prescription eyeglasses. If you received two lower numbers (Example: 32/33) this value represents the measurements from each separate pupil to the center of the nose for distance viewing. If you received two higher numbers (Example: 65/62) the larger number represents your pupil measurement for distance and the lower number represents the pupil measurement for reading. If you have two smaller numbers check the box “I have two PD numbers” and enter them separately; the first represents the right eye, the second represents the left eye. If you have two larger numbers and want distance vision glasses enter the larger of the two numbers. If you have two larger numbers and want reading vision glasses enter the smaller of the two numbers.

Note:  Never try to guess your PD. Either ask for it from your optometrist or optician, have a friend measure it, or you can measure it using a mirror.