Our opticians will analyze your photo using the PD fit strip to precisely calculate your Pupillary Distance. This measurement is required to accurately make your prescription.

PD should be as accurate and exact as possible. If the lenses are not centred properly, it can cause visual discomfort. However, it doesn't have to be 100% precise as a small margin for error.

Pupillary distance (PD) is the measurement of the distance between your eyes' pupils, expressed in millimeters. Your optician or eye doctor can measure your PD at your eye exam with an instrument called a pupillometer.

Does pupillary distance have to be exact? The pupillary distance measurement does not have to be 100% precise to be applicable, as it can tolerate a small error range. A PD difference of 1mm is not going to cause too much discomfort, and would not be noticeable.

The more accurate way to measure a PD is monocular, which is one eye at a time measured from the center of the pupil to the center of the bridge of the nose. One eye could be at 30 mm and the other at 31mm , giving the 61 mm total .

Thanks to a special device – pupillometer – it is able to measure PD with an accuracy of 0.5 mm. No good company dealing in the production of corrective lenses will create glasses for you without knowing this parameter, because it could expose you to serious health consequences and deterioration of eyesight.

Actually, the pupillary distance measurement does not have to be 100% precise to be useful, as it can tolerate a fairly small error range. A PD difference of 1mm is not going to cause trouble, in real terms, 2mm is a variance of 1mm to each eye, and would not be noticeable.

What happens if my pupillary distance is off? It is crucial to have your correct PD measurement – an incorrect PD can make it feel like you are wearing a different person's glasses. If your PD is incorrect, it can cause headaches, blurry vision and eye strain.

A PD difference of 1mm is not going to cause trouble, in real terms, 2mm is a variance of 1mm to each eye, and would not be noticeable. if you wear glasses with incorrect pupillary distance, you might feel headaches, eye strain and dizziness.

PD should be as accurate and exact as possible. If the lenses are not centred properly, it can cause visual discomfort. However, it doesn't have to be 100% precise as a small margin for error.

Thanks to a special device – pupillometer – it is able to measure PD with an accuracy of 0.5 mm. No good company dealing in the production of corrective lenses will create glasses for you without knowing this parameter, because it could expose you to serious health consequences and deterioration of eyesight.

Starting with the right eye, line up the zero end of the ruler at your pupil; measure the distance from your right to your left pupil. The millimeter number that lines up with your left pupil is the measurement you want: that number is your PD!