Commonly used spectacle lens materials include optical glass sheets, which have relatively stable refractive indices, but are easily broken and heavy. At present, resin sheets are more commonly used. Resin sheets are formed by chemical synthesis and processing with resin as raw materials. Its advantages are that it is lighter, more comfortable to wear, has strong impact resistance, and is not easy to break. In addition, the current technology has improved It also has good wear resistance, so it is a kind of lens that is very commonly used at present. There is also a lens called PC lens, which is a kind of polycarbonate. It has good toughness and is not easy to break. It can effectively prevent the lens from breaking during severe transportation, and it is also very light. Therefore, according to different needs, you can choose reasonable , suitable lenses.
If your prescription is not too high, then ordinary lenses are fine. There seems to be a kind of resin lens that is good at the moment.
It is recommended to go to a regular hospital for examination as soon as possible. Then follow the doctor's plan to match your glasses. Always pay attention to develop a good eye habit. Do not overuse your eyes, and keep away from mobile phones, computers, TVs and other electronic products. Don't overuse your eyes and don't read in dimly lit areas.
The advantages of imported lenses are high light transmittance, good clarity, high hardness, wear-resistant, anti-harmful light, etc. The disadvantage is that the price is high and it is not easy to distinguish the authenticity from the fake. Domestic lenses are moderately priced, have complete functions, and are also resistant to harmful light. Their shortcomings and hardness are worse than imported ones.
The choice of relatively myopic lenses is that the following materials are better:
First, we will choose materials with relatively small quality and light weight. The quality of the PC material lens is relatively light, it is very light to wear, and the patient will not feel very heavy.
Second, the lens with a relatively high refractive index will be selected. The refractive index may be 1.56, 1.61, and 1.72. For patients with high myopia, the highest refractive index can be selected. At present, there may be a refractive index of 1.72 or higher. The high refractive index of the lens means that the relative refractive index of the lens is relatively strong, and the lens is lighter.
Third, it is necessary to choose a lens with a clear coating. This coating is actually very important. It can effectively prevent scratches and scratches on the lens. It affects the visual experience, so it is best to coat the outer surface of the lens with a layer of anti-scratch film. The lens is easier to use in daily life.