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You do not know the little secret of eyeglasses, and the pupillary distance is essential to determining the comfort of wearing glasses.

Whenever in a public place, I unconsciously look at the passersby wearing eyeglasses. Although everyone has different styles of glasses, the effect is also different. I think they are beautiful to the naked eye, but in reality, I'm afraid it's a new world and a new horizon. According to incomplete statistical data, in a sample survey of a city, 70% of glasses qualified rate is less than. For example, it is the prescription, axial, pupillary distance, and the flatness of the eyeglasses. However, the most prominent problem is focused on the pupillary distance of the glasses above.

Generally speaking, two fundamental aspects make up a pair of eyeglasses: the eyeglasses frames and the prescription lenses. We won't talk about the frames here. Instead, the focus is on eyeglass lenses. When we speak about optical lenses alone, it is a lens prescription that contains myopia and astigmatism. But when we make prescription eyeglasses, we must process according to another essential parameter; that is, we usually forget the pupillary distance; the PD (pupil distance) also determines the comfort of wearing our eyeglasses.

In optometry, if we do not measure the pupillary distance first and estimate the choice of trial frame, it will create prisms. This situation will lead to inaccurate optometry data and trial lenses to produce eye swelling, discomfort, dizziness, object surface convexity, and other phenomena, thus setting obstacles to the smooth progress of optometry.

Therefore, we should measure pupillary distance before having an eye exam and try on a trial frame. According to the pupil distance and whether distance or near purposes, and the scientific choice of different models of the trial frame, the pupil distance and trial frame do not match the failure of optometry.

The accuracy of the pupillary distance, an essential parameter of a pair of prescription eyeglasses, directly affects the comfort of the patient wearing them. For example, suppose the PD (pupil distance) processing is inaccurate. In that case, the eyeglasses lenses will produce a prismatic effect, causing the patient's eye muscles and vision to quickly fatigue, affecting their vision correction. In addition, and sometimes lead to further loss of vision and increase the prescription of the eyes; the incorrect pupil distance performance through the lens to see objects produces displacement or deformation distortion, wearing a sense of discomfort. Therefore, the pupil distance is an integral part of deciding the comfort of wearing eyeglasses.

Having learned so much, be sure to get the precise parameters of your pupil distance before choosing your eyeglass frames. If your prescription list does not include this parameter, you can ask your eye doctor or measure pupillary distance yourself.

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