Does pupillary distance have to be exact?

[Kinnickinnic]

Is it very important to get exact pupillary distance for buying eyeglasses? And what will happen if i wear glasses with incorrect pupillary distance?

[Newell]

It is very important to get exact pupillary distance in the preparation for making prescription glasses, for it positions lenses correctly in relation to the center of the pupils. Besides, it is especially important in making higher powered lenses because of the location of the optical center of the lenses. The effect of incorrect pupillary depends on the power of the lenses. If your lenses are of low power, small error will not cause uncomfortable feeling while big one such as 10mm will lead to vision distortion and headache. If your lenses are of higher power, you should pay particular attention to the pupillary distance.

[Laurinburg]

Pupillary distance refers to the distance between the two central of the pupilla of your eyes when you are looking squarely or of parrallel. The purpose to measure the pupillary distance is to make the distance of the optical centrer of the glasses conform to your pupillary distance, thus making sure that your eyes can see through the optical center as usual. Therefore, it is decisive to measure your pupillary distance to choose the right glasses bracket. To wear a pair of glasses with the correct pupillary distance can make you comfortable and see things clearly. To the contrary, if you are wearing glasses with incorrect pupillary distance, there will be a prism effect when you see through the glasses, and you will feel symptoms of vision fatigue, dizzy, and nausea. If you wear this pair of glasses from time to time, it will certainly do harm to your eye sight. Please go to the eyeglasses shop to correct the pupillary distance of your glasses as soon as possible.

[Laurium]

Yes, it can't be more important when buying eyeglasses. Glasses of the wrong size will not feel comfortable to wear, and can cause vision problems. The least con would be that the vision of the patient can't be corrected appropriately. Worse still, the patients can also develop headaches and eye strain because their eyes have trouble focusing through the lenses. You may suffer from double vision, headache, astigmatism, dispersion, strabismus or even the change of the positions of your eyes. Thus, it's crucial to get exact pupil distance when having prescription.