Conclusion first: Large - framed glasses are not suitable for people with high myopia.

Lenses for high myopia are thick and the overall weight is heavy. Wearing them for a long time will put significant pressure on the nasal wings. Over time, it can easily lead to deformation of the nasal bridge.

So, how should people with high myopia choose lenses and frames?

Frame Selection

1.Prioritize lightweight materials

The weight of the frame material is one of the factors affecting the overall weight of the glasses. For people with high myopia, when choosing a frame, they can pay more attention to materials such as pure titanium, tungsten carbon, thin - sheet plates, and TR90. Frames made of these materials are generally lightweight, highly comfortable to wear, durable, and not prone to deformation.

2.Full - frame > Semi - frame > Rimless frame

Lenses for high myopia are usually thick. Rimless and semi - rimless frames will expose the thickness of the lenses, which may not look very aesthetically pleasing. Moreover, these frames are prone to deformation, which can cause changes in the optical center distance of the glasses and the axis of the lenses, affecting the correction effect. Therefore, full - frame glasses are a better choice for people with high myopia.

3.It is not recommended to choose large - framed glasses

People who wear large - framed glasses for a long time may experience a significant decline in vision, a reduction in field of vision, and may feel dizzy and light - headed after wearing them for a long time. Also, large - framed glasses are relatively heavy, which is very bad for people with high myopia.

Wearing them for a long time will put heavy pressure on the nasal wings, and over time, it is likely to cause nasal bridge deformation.

In fact, many experts have questioned large - framed glasses. Due to the large size of the lenses in large - framed glasses, the optical center distance may not match the visual center distance of the human eye. There are many important parameters in optometry and glasses fitting, such as diopter and pupillary distance. When fitting large - framed glasses, special attention should be paid to whether the distance between the centers of the two lenses corresponds to the distance between the pupils of your eyes.

Otherwise, even if the glasses are of the correct degree, the wearer may feel uncomfortable, and over time, it will affect vision.

Therefore, it is advisable to choose frames with a relatively small mirror width and a relatively small vertical height. This can prevent a decrease in comfort due to peripheral distortion.

4.Choose frames with a relatively close vertex distance

The vertex distance refers to the distance between the back vertex of the lens and the front vertex of the cornea. Corrective lenses for myopia are concave lenses. If the vertex distance increases, its effective refractive power decreases (the higher the myopia degree, the greater the decrease), and the corrected vision will also decline.
Therefore, the vertex distance of high - myopia glasses should be minimized. In terms of frame style selection and frame adjustment, it is advisable to choose frames with nose pads or those with a relatively close vertex distance.

5.Do not choose frames with too thin temple arms

Too thin temple arms can make the frame unbalanced in terms of front - to - back stress, making it top - heavy. Most of the weight will be pressed on the nose, causing the glasses to slide down easily and affecting the wearing comfort.

Lens Selection

1.Prioritize resin and PC lenses

The main types of lens materials are glass lenses, resin lenses, and PC lenses (polycarbonate lenses).

The most significant drawback of glass lenses is their weight, which is particularly prominent in high - myopia lenses. This causes obvious pressure on the root of the nose and the back of the ears of the wearer, and often the wearer cannot tolerate it. The latter two types, due to their light texture and strong plasticity, have been widely used in recent years and occupy an absolute share of the lens market.

For high - myopia lenses, it is better to choose resin lenses and PC lenses.

2.Prioritize a higher refractive index

Generally, the higher the refractive index, the thinner the lens. For high myopia, it is recommended to choose lenses with a refractive index of at least 1.67. There are also thinner options such as 1.74 and 1.76. In glass lenses, there are 1.80 and 1.90, but they are more fragile compared to resin lenses, so attention should be paid to daily protection.

It should be emphasized that people with high myopia choose high - refractive - index lenses to reduce the weight of the lenses and improve wearing comfort due to their high degree. However, the higher the refractive index of the lens, the greater the chromatic aberration, and the light transmittance will be slightly worse, and it may take a little longer to get used to.

Therefore, if you can accept the weight of the lens and the thickness of the edge, it is better to choose a relatively lower refractive index, such as 1.67.

3.Prioritize aspheric lenses

People with high myopia should choose lenses with an aspheric design. Aspheric lenses have a specific decentration, that is, the lens gradually flattens from the center to the edge, gradually reducing the curvature, thereby reducing the excessive refractive power and astigmatism at the edge.

So, compared with ordinary lenses of the same refractive power, aspheric lenses are 10% - 30% thinner, and the aberration of aspheric lenses is only 1/5 of that of spherical lenses. Therefore, the vision through aspheric lenses is natural, and the magnification is uniform without deformation.

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